Toshiba N300 Pro: Part Numbers, the 24TB Rating Split, and How It Meets Toshiba MG

Toshiba N300 Pro prices on Amazon.co.uk

This table shows listings titled Toshiba N300 Pro on Amazon.co.uk, in pounds inc VAT. The table shows no listings right now. Lowest price in it: -.

Check the part number before anything else. A full number such as HDWG51CXZSTB or HDWG51GXZSTB is not on Toshiba's N300 Pro sheet, which gives HDWG51CUZSVB and HDWG51GUZSVB; the two share only the model numbers HDWG51C and HDWG51G. The reverse can happen too: HDWG480 is an N300 Pro model number on Toshiba's sheet, so a listing titled plain N300 that prints it may be an N300 Pro. Ask the seller which Toshiba document the drive belongs to before relying on a figure below.

In-stock alternatives

None of these is the product this page covers: they are what is in stock on Amazon.co.uk beside it right now. Each row says why it is listed. Check the interface, form factor and part number against your system before buying.

Toshiba N300 Pro 10TB, 12TB and every other part number

Toshiba's N300 Pro data sheet lists fifteen models from 24 TB down to 4 TB. At 10, 8, 6 and 4 TB there are two models per capacity:

• 24 TB: HDWG82E, part number HDWG82EUZSVB
• 22 TB: HDWG62C, part number HDWG62CUZSVB
• 20 TB: HDWG62A, part number HDWG62AUZSVB
• 18 TB: HDWG51J, part number HDWG51JUZSVB
• 16 TB: HDWG51G, part number HDWG51GUZSVB
• 14 TB: HDWG51E, part number HDWG51EUZSVB
• 12 TB: HDWG51C, part number HDWG51CUZSVB
• 10 TB: HDWG71A (HDWG71AUZSVB) or HDWG51A (HDWG51AUZSVB)
• 8 TB: HDWG780 (HDWG780UZSVB) or HDWG480 (HDWG480UZSVB)
• 6 TB: HDWG760 (HDWG760UZSVB) or HDWG460 (HDWG460UZSVB)
• 4 TB: HDWG740 (HDWG740UZSVD) or HDWG440 (HDWG440UZSVB)

All but one part number end UZSVB; HDWG740's ends UZSVD. Every model on the sheet lists CMR and up to 24 drive bays, so the Toshiba N300 Pro 12TB is rated for the same size of NAS as the 24 TB. The plain N300 has its own retail and bulk numbers on a different Toshiba sheet, set out on the Toshiba N300 page; compare the full number against both before deciding which drive a listing is.

Toshiba N300 Pro 10TB: HDWG71A or HDWG51A

The Toshiba N300 Pro 10TB comes as two drives with the same ratings and very different noise:

HDWG51A idles 14 dB quieter on Toshiba's figures with nothing given up on speed, buffer, MTTF or workload. For a NAS in a room people use, it is the 10 TB to look for by number.

Toshiba N300 Pro 8TB, 6TB and 4TB: two models each

Below 10 TB the pairs follow one pattern. The HDWG7x0 models are rated faster with the larger buffer and print 34 dB at idle; the HDWG4x0 models are slower with half the buffer and print 31 dB at idle. Seek is 35 dB on all six, and every one carries 300 TB a year and 1,200,000 hours MTTF.

• 8 TB: HDWG780 at 281 MB/s and 512 MB; HDWG480 at 260 MB/s and 256 MB
• 6 TB: HDWG760 at 281 MB/s and 512 MB; HDWG460 at 250 MB/s and 256 MB
• 4 TB: HDWG740 at 281 MB/s and 512 MB; HDWG440 at 232 MB/s and 256 MB

Toshiba N300 Pro 24TB against 22TB and below: the rating split

The 24 TB model sits on a higher tier than everything beneath it:

Going from 22 TB to 24 TB buys 250 TB a year more workload, more than twice the MTTF and 28 MB/s more sustained rate, with no change in bay rating or noise. The 16, 14 and 12 TB models share the 18 to 22 TB figures of 300 TB a year, 1,200,000 hours, 281 MB/s, 20 dB idle and 32 dB seek, and Toshiba gives them a 512 MB buffer.

Toshiba N300 vs N300 Pro

The plain N300 and the N300 Pro share a name, but Toshiba rates them for different jobs.

The plain N300 is rated for up to 8 bays on Toshiba's 06/2025 sheet; the one exception is the 22 TB MN11ACA22TS, which Toshiba's 2026-04 revision rates for up to 12. So for more than twelve bays, for more than eight with any plain N300 other than that 22 TB model, or for a yearly workload above 180 TB, the N300 Pro is the Toshiba NAS drive whose ratings cover it. Below that, the plain N300 may be enough. The table below holds the plain N300 offers with the lowest price per TB, so you can see what stepping down would save. It holds 4 listings right now. Lowest per TB in it: £36.64/TB.

Toshiba N300 Pro against Toshiba MG enterprise drives

This is where a NAS drive and an enterprise drive come closest. Toshiba rates MG11, which it lists at 14 to 24 TB, at 550 TB a year with 2,500,000 hours MTTF/MTBF at 0.35% AFR, and prints its acoustics as sound power, measured to ISO 7779. On workload, MTTF and Toshiba's own dB figures, the N300 Pro 24TB matches it.

Below 24 TB the gap opens. Toshiba rates MG10, listed at 16, 18 and 20 TB, at 550 TB a year, against 300 for the N300 Pro at those sizes, and the N300 Pro's MTTF below 24 TB is 1,200,000 hours against MG11's 2,500,000. At 16, 18 or 20 TB, then, the MG drive carries the higher rating on Toshiba's own documents.

Warranty is the row we cannot fill. The N300 Pro data sheet has no warranty line, and we have not found another Toshiba document that states the N300 Pro warranty, so we print none. For comparison, WD gives its Ultrastar DC HC580 enterprise drive a 5-year limited warranty. Ask the seller what warranty the N300 Pro carries before you treat it as an enterprise substitute. The Toshiba MG series page covers the enterprise side, and Toshiba MG vs N300 compares the two families directly.

Sizing an N300 Pro array

Every N300 Pro on Toshiba's sheet, from 4 TB to 24 TB, is specified for up to 24 bays. Within that, the RAID level decides usable capacity and how many drives can fail. Run your bay count and drive size through the calculator.