Updated 1 hour ago · Specifications verified October 12, 2026

Calculate Usable Storage on the DS925neo+

Pre-filled for 4 bays with only supported RAID and SHR choices

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Quick answer

Set a drive size and choose SHR, SHR-2 or a supported classic RAID level to see the DS925neo+'s raw capacity, estimated usable storage, protection overhead, live drive-set cost and effective usable price per terabyte. The model is pre-filled for 4 internal bays; expansion-unit planning should be calculated separately.

As of October 27, 2026

Best price per TB

$33.28

In-stock listings in the tables on this page

Prices updated

1 hour ago

Pre-filled for the Synology DS925neo+: 4 bays, up to 24TB per bay.

RAID levelNumber of drivesSize per drive (TB)

Common sizes

Mixed drive sizes (SHR reclaims the surplus)

Usable capacity

21.83 TB

Raw total

32.00 TB

Protection overhead

8.00 TB

Fault tolerance

1 drive

Live drive cost

$1065

Usable price per TB

$48.79

With 4x 8TB in Synology SHR you get about 21.83 TB usable and 1-drive fault tolerance. At the cheapest live NAS price per terabyte ($33.28/TB), filling these bays costs about $1065.

Usable capacity is shown after binary and filesystem overhead (about 9%). Fault tolerance is not a backup; keep a separate copy of important data.

Live new SATA CMR drives for the DS925neo+

Price per

Sort

60 products

Product	Capacity	Price	$ / TB	Type	Prime	Buy
Western Digital Ultrastar DC HC550 18 TB Hard Drive - 3.5 Internal - SATA	18 TB	$599.00	$33.28	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate Exos X14 ST12000NM0008 12 TB Hard Drive - 3.5" Internal - SATA (SATA/600)	12 TB	$444.99	$37.08	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
TOSHIBA N300 Internal Hard Drive 22 Tb 7200 RPM 512 Mb 3.5", W129161818 (Tb 7200 RPM 512 Mb 3.5 Serial Ata Iii)	22 TB	$831.00	$37.77	NAS HDD · SATACMR	-	Buy on Amazon
Toshiba - HDWG82AXZSTB - Toshiba N300 Pro HDWG82AXZSTB 20 TB Hard Drive - 3.5 Internal - SATA (SATA/600) - Conventional	20 TB	$766.99	$38.35	NAS HDD · SATACMR	-	Buy on Amazon
Seagate Enterprise 3.5" 18000 GB 7200 RPM 18 TB 3.5" 7200 RPM SATA ST18000NM00J	18 TB	$694.00	$38.56	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Toshiba MG Series Enterprise 14TB 3.5’’ SATA 6Gbit/s Internal HDD 7200RPM 550TB/year 24/7 Operation. MG07ACA14TE	14 TB	$539.99	$38.57	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Toshiba MG Series Enterprise 12TB 3.5’’ SATA 6Gbit/s Internal HDD 7200RPM 550TB/year 24/7 Operation. MG07ACA12TE	12 TB	$469.99	$39.17	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate IronWolf Pro, 16 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage (ST16000NT001)	16 TB	$629.99	$39.37	NAS HDD · SATACMR	-	Buy on Amazon
Seagate Enterprise Capacity \| ST10000NM0016 \| 10TB 7200 RPM SATA 6.0Gb/s 256MB Cache Hyperscale 512e 3.5" Hard Disk Drives	10 TB	$399.95	$39.99	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate Exos X10 ST10000NM0126 10TB 7200 RPM SATA 6Gb/s 512e 256MB 3.5in Enterprise Hard Drive	10 TB	$399.99	$40.00	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
DC HC550 16TB 512MB SATA Ultra SE NP3	16 TB	$649.45	$40.59	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Western Digital WUH721414ALE6L4 14TB Ultrastar DC HC530 SATA HDD - 7200 RPM Class, SATA 6 Gb/s, 512MB Cache, 3.5"	14 TB	$581.00	$41.50	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Western Digital 18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD181KFGX	18 TB	$752.99	$41.83	NAS HDD · SATACMR	-	Buy on Amazon
Toshiba - HDWG81GXZSTB - Toshiba N300 Pro HDWG81GXZSTB 16 TB Hard Drive - 3.5 Internal - SATA (SATA/600) - Conventional	16 TB	$677.08	$42.32	NAS HDD · SATACMR	-	Buy on Amazon
Toshiba MG Series Enterprise 14TB 256MB Cache 7200RPM SATA 6.0Gb/s 3.5" Internal Enterprise Hard Drive (MG08ACA14TE)	14 TB	$599.99	$42.86	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate 14TB HDD Exos X14 7200 RPM 512e/4Kn SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive (ST14000NM0018)	14 TB	$600.00	$42.86	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
HGST WD Ultrastar DC HC510 10TB 7200 RPM SATA 6Gb/s 3.5" Helium Platform Enterprise Hard Disk Drive - HUH721010ALE604 (0F27606)	10 TB	$429.00	$42.90	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate IronWolf Pro, 20 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage (ST20000NT001)	20 TB	$879.99	$44.00	NAS HDD · SATACMR	-	Buy on Amazon
Seagate IronWolf Pro 24TB Enterprise NAS Internal HDD Hard Drive – CMR 3.5 Inch SATA 6Gb/s 7200 RPM 512MB Cache for RAID Network Attached Storage, Rescue Services (ST24000NT002)	24 TB	$1,059.99	$44.17	NAS HDD · SATACMR	-	Buy on Amazon
Seagate Exos 7E8 6TB Internal Hard Drive Enterprise HDD – CMR 3.5 Inch 512E SATA 6Gb/s 7200 RPM 128MB Cache for Enterprise, Data Center – Frustration Free Packaging (ST6000NM021A)	6 TB	$266.02	$44.34	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 GB/s, CMR, 512 MB Cache, 3.5" - WD120EFGXSold by Amazon	12 TB	$533.81	$44.48	NAS HDD · SATACMR	Prime	Buy on Amazon
Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD161KFGXSold by Amazon	16 TB	$714.99	$44.69	NAS HDD · SATACMR	Prime	Buy on Amazon
Western Digital 20TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD202KFGXSold by Amazon	20 TB	$894.78	$44.74	NAS HDD · SATACMR	Prime	Buy on Amazon
Toshiba MG09ACA18TE 18 TB Hard Drive - 3.5 Internal - SATA [SATA/600]	18 TB	$809.00	$44.94	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate IronWolf 10Tb NAS Internal Hard Drive HDD – 3.5 Inch SATA 6GB/S 7200 RPM 256MB Cache for Raid Network Attached Storage (ST10000VN0004)	10 TB	$450.00	$45.00	NAS HDD · SATACMR	-	Buy on Amazon
Western Digital 12TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD122KFBXSold by Amazon	12 TB	$539.99	$45.00	NAS HDD · SATACMR	Prime	Buy on Amazon
Seagate IronWolf Pro 14TB NAS Internal Hard Drive HDD – CMR 3.5 Inch SATA 6Gb/s 256MB Cache for RAID Network Attached Storage, Data Recovery Service – Frustration Free Packaging (ST14000NEZ008)	14 TB	$631.00	$45.07	NAS HDD · SATACMR	-	Buy on Amazon
HGST - WD Ultrastar DC HC520 HDD \| HUH721212ALE600 \| 12TB 7.2K SATA 6Gb/s 256MB Cache 3.5-Inch Helium Data Center Internal Hard Disk Drive	12 TB	$541.45	$45.12	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate IronWolf 10TB NAS Internal Hard Drive, 3.5" SATA 6Gb/s, 7200 RPM, CMR, RAID Optimized, IronWolf Health Management – for NAS Systems (ST10000VNZ00)	10 TB	$455.58	$45.56	NAS HDD · SATACMR	-	Buy on Amazon
Seagate IronWolf 10TB NAS Internal Hard Drive HDD – CMR 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache for RAID Network Attached Storage, with Rescue Service (ST10000VN0008)	10 TB	$459.00	$45.90	NAS HDD · SATACMR	-	Buy on Amazon
Western Digital 10TB WD Red Plus NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 GB/s, CMR, 512 MB Cache, 3.5" - WD100EFGXSold by Amazon	10 TB	$459.99	$46.00	NAS HDD · SATACMR	Prime	Buy on Amazon
Western Digital Ultrastar DC HC580 WUH722424ALE604 0F62798 24TB 7.2K RPM SATA 6Gb/s 512e 3.5in Enterprise Hard Drive	24 TB	$1,106.90	$46.12	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate Exos X18 Enterprise Class, 16TB, Enterprise Internal Hard Drive, SATA, 3,5" 6Gbit/s, 128MB Cache (ST16000NM000J)	16 TB	$739.96	$46.25	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate IronWolf 14TB NAS Internal Hard Drive HDD – CMR 3.5 Inch SATA 256MB Cache for RAID Network Attached Storage – Frustration Free Packaging (ST14000VN0008)	14 TB	$649.98	$46.43	NAS HDD · SATACMR	-	Buy on Amazon
Western Digital Ultrastar DC HC550 WUH721816ALE6L4 0F38462 16TB 7.2K RPM SATA 6Gb/s 512e 512MB 3.5" SE HDD	16 TB	$744.45	$46.53	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate IronWolf Pro, 14 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage (ST14000NT001)	14 TB	$654.45	$46.75	NAS HDD · SATACMR	-	Buy on Amazon
Seagate IronWolf Pro 16TB 7200 RPM SATA 6Gb/s 3.5" NAS HDD (ST16000NE000)	16 TB	$748.46	$46.78	NAS HDD · SATACMR	-	Buy on Amazon
Western Digital 16TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD161KRYZSold by Amazon	16 TB	$754.99	$47.19	Enterprise HDD · SATACMREnterprise	Prime	Buy on Amazon
Exos X24 3.5" Internal Hard Drive, 12TB, Single, SATA III 6 Gb/s \| 2.5M-hour MTBF, 550TB/year Workload Rating, 285MB/s Transfer Rate, Data Centers, RAID, Backup	12 TB	$569.99	$47.50	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Western Digital 18TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD181KRYZ	18 TB	$854.99	$47.50	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate Exos X18 ST18000NM001J 18 TB Hard Drive - Internal - SATA (SATA/600)	18 TB	$859.45	$47.75	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate IronWolf 16TB NAS Internal Hard Drive HDD – CMR 3.5 Inch SATA 6GB/S 7200 RPM 256MB Cache for Raid Network Attached Storage, with Rescue Service (ST16000VN001)	16 TB	$764.44	$47.78	NAS HDD · SATACMR	-	Buy on Amazon
Seagate IronWolf ST16000VN001 16 TB Hard Drive - 3.5" Internal - SATA (SATA/600)	16 TB	$764.74	$47.80	NAS HDD · SATACMR	-	Buy on Amazon
Western Digital 14TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD141KRYZ	14 TB	$670.00	$47.86	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Western Digital 6TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" -WD60EFPX	6 TB	$289.99	$48.33	NAS HDD · SATACMR	-	Buy on Amazon
WD WUS721010ALE6L4 Ultrastar DC HC330 0B42266 10TB 7200 RPM SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive	10 TB	$484.45	$48.45	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate IronWolf 18TB NAS Internal Hard Drive HDD – CMR 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache for RAID Network Attached Storage, Rescue Services – Frustration Free Packaging (ST18000VNZ00)	18 TB	$874.45	$48.58	NAS HDD · SATACMR	-	Buy on Amazon
Western Digital WUH721816ALE6L4 3.5" 16TB SATA 6Gb/s7.2K RPM 512M 0F38462 512e/4Kn HDD	16 TB	$784.45	$49.03	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate IronWolf Pro 14 TB NAS RAID Internal Hard Drive - 7,200 RPM SATA 6 Gb/s 3.5-inch (ST14000NE0008)	14 TB	$689.20	$49.23	NAS HDD · SATACMR	-	Buy on Amazon
Western Digital 12TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD122KRYZSold by Amazon	12 TB	$594.99	$49.58	Enterprise HDD · SATACMREnterprise	Prime	Buy on Amazon
WD Red Pro 18TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR, 512MB Cache	18 TB	$894.45	$49.69	NAS HDD · SATACMR	-	Buy on Amazon
Seagate IronWolf Pro ST12000NE0008 12 TB Hard Drive - 3.5" Internal - SATA (SATA/600)	12 TB	$599.00	$49.92	NAS HDD · SATACMR	-	Buy on Amazon
Seagate IronWolf Pro 3.5" 12TB HDD with Data Recovery Service 5 Year Warranty 256MB 7200rpm 24 Hours Service for PC NAS RV Sensor ST12000NE0008	12 TB	$599.00	$49.92	NAS HDD · SATACMR	-	Buy on Amazon
Western Digital Ultrastar WUH722020CLE6L4 20 TB Hard Drive - 3.5" Internal - SATA - Energy-Assisted Magnetic Recording (EAMR) Method	20 TB	$999.00	$49.95	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Toshiba 4TB Enterprise Internal Hard Drive – MG Series 3.5" SATA HDD for Server, Storage, 24/7 Operation, Hyperscale, Cloud (MG04ACA400E)	4 TB	$199.99	$50.00	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
WD Red Plus 6TB NAS 3.5" Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, CMR, 256MB Cache	6 TB	$299.99	$50.00	NAS HDD · SATACMR	-	Buy on Amazon
Western Digital 8TB WD Red Plus NAS Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD80EFZZ	8 TB	$399.99	$50.00	NAS HDD · SATACMR	-	Buy on Amazon
Seagate 8TB Enterprise Capacity 3.5 HDD 7200RPM SATA 6Gbps 256 MB Cache Internal Bare Drive (ST8000NM0055)	8 TB	$400.00	$50.00	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate IronWolf 10TB NAS Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache RAID Network Attached Storage Home Servers - (ST10000VN0008)	10 TB	$500.00	$50.00	NAS HDD · SATACMR	-	Buy on Amazon
Seagate IronWolf Pro ST12000NE0008 12 TB Hard Drive - 512E Format - SATA 600-3.5" Drive - Internal - 7200RPM - 256 MB Buffer - Hot Pluggable	12 TB	$608.53	$50.71	NAS HDD · SATACMR	-	Buy on Amazon

Renewed, refurbished and used listings

Shown for reference. These are not counted in the best price per TB above, and warranty terms differ from new drives.

Price per

Sort

20 products

Product	Capacity	Price	$ / TB	Type	Prime	Buy
Western Digital 6TB WD Red Plus NAS Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" -WD60EFZXUsedSold by Amazon	6 TB	$148.30	$24.72	NAS HDD · SATACMR	Prime	Buy on Amazon
MDD MAXDIGITALDATA MDD (MDD14TSATA25672E) 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5'' Internal Enterprise Hard Drive - 5 Years Warranty (Renewed)Renewed	14 TB	$349.99	$25.00	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Toshiba 14TB SATA 512e 256MB Cache 7200RPM 3.5" SATA 6.0Gb/s Enterprise Hard Drive - MG07ACA14TE (Renewed)Renewed	14 TB	$354.00	$25.29	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
MDD MAXDIGITALDATA MDD (MDD14TSATA25672E) 14TB 7200RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Enterprise Hard Drive - 5 Years Warranty (Renewed)Renewed	14 TB	$359.99	$25.71	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate Exos x12 12TB SATA 6Gb/s 256MB Cache Enterprise Hard Drive 3.5in (ST12000NM0127) (Renewed)Renewed	12 TB	$317.99	$26.50	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate Exos X14 ST12000NM0008 12 TB Hard Drive - 3.5" Internal - SATA (SATA/600)Used	12 TB	$319.59	$26.63	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
MDD (MDD12TSATA25672E) 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Internal Enterprise Hard Drive - 5 Years Warranty (Renewed)Renewed	12 TB	$319.99	$26.67	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Seagate Constellation ES.3 ST4000NM0033 4 TB Hard Drive - 3.5 Internal - SATAUsed	4 TB	$107.00	$26.75	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
HP/Western Digital Ultrastar DC HC550 WUH721818ALE600 0F38492 18TB 7200 RPM SATA 6Gb/s 512e 512MB Cache Power Disable 3.5in Enterprise Hard Drive MB018000GXLAV P37677-001 (Renewed)Renewed	18 TB	$488.00	$27.11	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Western Digital 14TB Ultrastar DC HC530 SATA HDD - 7200 RPM Class, SATA 6 Gb/s, 512MB Cache, 3.5" - WUH721414ALE604 (Renewed)Renewed	14 TB	$379.99	$27.14	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
Western Digital 14TB Ultrastar DC HC530 SATA HDD - 7200 RPM, SATA 6 Gb/s, 512MB Cache, 3.5" - WUH721414ALE604 (Renewed)Renewed	14 TB	$389.99	$27.86	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
HGST - WD Ultrastar DC HC520 HDD \| HUH721212ALE601 \| 12TB 7200RPM SATA 6Gb/s 256MB Cache 3.5-Inch \| ISE 512e \| Helium Data Center Internal Hard Disk Drive (Renewed)Renewed	12 TB	$339.49	$28.29	Enterprise HDD · SATACMREnterprise	-	Buy on Amazon
MDD (MDD24TSATA51272E) 24TB 7200RPM 512MB Cache SATA 6.0Gb/s 3.5inch Internal Enterprise Hard Drive - 5 Years Warranty (Renewed)Renewed	24 TB	$789.99	$32.92	Enterprise HDD · SATARecording type not confirmed by MDDNASEnterprise	-	Buy on Amazon
Seagate Exos ST24000NM001C 24TB 7200RPM 512e SATA 6Gb/s 512MB Cache 3.5-Inch Enterprise Hard Drive (Renewed)Renewed	24 TB	$789.99	$32.92	Enterprise HDD · SATARecording type not confirmed by SeagateNASEnterprise	-	Buy on Amazon
Seagate Exos X24 24TB Enterprise Hard Drive HDD SATA 6Gb/s 512MB Cache 7200 RPM 512e CMR Helium Sealed 3.5in Hard Drive ST24000NM000H (Renewed)Renewed	24 TB	$798.99	$33.29	Enterprise HDD · SATARecording type not confirmed by SeagateNASEnterprise	-	Buy on Amazon
Seagate Exos ST24000NM000C 24TB 7.2K RPM SATA 6Gb/s 512e 3.5in Enterprise Hard Drive (Renewed)Renewed	24 TB	$799.99	$33.33	Enterprise HDD · SATARecording type not confirmed by SeagateNASEnterprise	-	Buy on Amazon
Seagate Exos 22TB SATA HDD 6Gb/s 7200RPM 3.5-inch Enterprise Hard Drive (ST22000NM000C) (Renewed)Renewed	22 TB	$739.99	$33.64	Enterprise HDD · SATARecording type not confirmed by SeagateNASEnterprise	-	Buy on Amazon
Western Digital IU HA570 WD240EDGZ 24TB 7200 RPM SATA 6Gb/s 512e 3.5in Enterprise Hard Drive (Renewed)Renewed	24 TB	$819.00	$34.13	Enterprise HDD · SATARecording type not confirmed by Western DigitalNASEnterprise	-	Buy on Amazon
Toshiba 22TB Enterprise Internal Hard Drive – MG Series 3.5" SATA HDD for Server, Storage, 24/7 Operation, Hyperscale, Cloud (MG10AFA22TE)	22 TB	$937.00	$42.59	Enterprise HDD · SATARecording type not confirmed by ToshibaNASEnterprise	-	Buy on Amazon
Seagate Exos ST24000NM000C 24TB 7.2K RPM SATA 6Gb/s 512e 3.5in Enterprise Hard DriveUsed	24 TB	$1,042.99	$43.46	Enterprise HDD · SATARecording type not confirmed by SeagateNASEnterprise	-	Buy on Amazon

Common 4-bay configurations

Drives	Mode	Raw capacity	Protection	Approx. usable after 9% allowance
4 × 8TB	SHR / RAID 5	32TB	1 drive	21.8TB
4 × 12TB	SHR / RAID 5	48TB	1 drive	32.7TB
4 × 16TB	SHR-2 / RAID 6	64TB	2 drives	29.1TB
4 × 20TB	SHR / RAID 5	80TB	1 drive	54.6TB

How to choose protection

SHR-1 and RAID 5 keep one drive's worth for parity. SHR-2 and RAID 6 reserve two, which is easier to justify as bay count and rebuild exposure grow. RAID 10 mirrors pairs and trades half of raw capacity for a simpler performance layout.

The estimated live cost multiplies current safe-filtered new-drive pricing by raw capacity. It is a planning figure, not a checkout quote; open the matching retail row to confirm seller, warranty and final price.

Capacity planning by workload

Use case	Best choice	Why
Photos and documents	8–12TB drives	Comfortable growth without buying the highest capacities immediately.
PC and office backup	12–16TB drives	Allows versions, snapshots and retention rather than sizing only today's files.
Plex and video	16–24TB drives	Large sequential media libraries consume capacity quickly.
Surveillance	Model retention first	Camera count, bitrate and days retained determine the pool.

Synology third-party drive policy, as of DSM 7.3

DSM 7.3, released October 8, 2025, lets Synology Plus, Value and J models released in 2025 and later install DSM and create storage pools on third-party hard drives and 2.5-inch SATA SSDs. Synology's policy table names those series and does not list the neo+ line separately; the DS925neo+ is a Plus-platform model released in 2026, and the hard-drive compatibility list Synology publishes for it contains Synology drives only. Check that list before buying third-party drives for it.

M.2 NVMe is the exception. Creating an M.2 storage pool or an SSD cache on the DS925neo+ still requires a drive on Synology's compatibility list, and that list contains Synology SNV3400, SNV3410 and SNV5420 drives only.

Hard drives and 2.5-inch SATA SSDs that are not on Synology's compatibility list: supported for a new installation, for creating a storage pool and for migration. Synology still recommends listed drives.
M.2 NVMe SSDs that are not on the compatibility list: cannot create a storage pool or an SSD cache. They are accepted only when migrated, already in use, from another Synology system.
Any drive on Synology's incompatibility list: not supported for installation, storage pools or cache.

Checked on October 12, 2026. Sources: Synology Knowledge Center: Drive compatibility policies for systems from 2025 (DSM 7.3 and above); Synology press release, 8 October 2025: DiskStation Manager 7.3; Synology Products Compatibility List: DS925neo+, M.2 SSD via internal slot.

Can you buy a neo+ model in the United States?

On October 12, 2026 none of the four neo+ models had a product page on Synology's US site, and none could be bought from a US seller on Amazon.com. Amazon.com carries a DS925neo+ listing that is out of stock with no offer, and a DS725neo+ sold and shipped by Amazon Japan as an import at $818.82. We found no Amazon.com listing for the DS1525neo+ or DS1825neo+.

Synology's announcement said the line would sell through its global channels, but an import from another region carries that region's warranty and power cord, so treat the Japanese listing as an import, not a US launch. The regular Plus model is the one with US availability today.

Checked on October 12, 2026. Sources: Synology US product list (no neo+ product pages); Amazon.com listing: Synology DS925neo+ (out of stock); Synology Knowledge Center: model list that names the four neo+ models.

Independent US storage-value site: NAS drives, DIY/TrueNAS build parts, and hard-drive shucking, ranked by live $/TB. Not affiliated with or endorsed by Synology, UGREEN, QNAP, TerraMaster, Seagate, Western Digital or Toshiba. All trademarks belong to their owners.

Last updated: 2026-10-27 12:02:32 UTC. As an Amazon Associate we earn from qualifying purchases. Product prices and availability are accurate as of the date indicated on Amazon.com and are subject to change. Any price displayed at the time of purchase will apply. CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON SERVICES LLC. THIS CONTENT IS PROVIDED AS IS AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.