rscheffler Offline Upload & Sell: Off
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I don't think there is a difference in quality between the two major makes: Seagate and WD. 4TB is probably the sweet spot for $/TB.
If you don't need a whole ton of storage (more than 2TB), prices of SSD drives are now quite compelling. Of course not as inexpensive as traditional HDDs, especially at the higher capacities, but up to 2TB is now fairly reasonable. SSD prices have dropped by about half in the past 1-1.5 years. No need to worry about damage in transit. You can pop one in a USB enclosure, of just use it bare with a USB-SATA cable.
SSDs probably benefit from use with newer operating systems due to differences in how they allocate and reclaim free space. I.e. TRIM and garbage collection, possibly not supported by XP.
The ultra cheap HDDs, such as 4TB for $80 and 8TB for $130, probably use SMR - Shingled Magnetic Recording technology, which packs more information into a given area. Due to how it works, combined with inexpensive consumer drives, performance tends to take a hit during extended, sustained write sessions. These drives have a fast cache of a given size to allow burst transfers, which are then transferred behind the scenes to permanent locations on the drive. If you tend to write a lot to a drive in a session, after the SMR drive's cache fills, you'll be hit with glacial write speeds. Potentially worse than USB 2 speeds. For example when SMR first came to the market Seagate marketed them as 'archive' drives. I have some of these as 8TB and they are extremely slow write speed once you fill the cache. Later Seagate silently migrated SMR to their 4TB drives. The only way you'd know when buying online was if you recognized the slightly different model number. Physically, the bare 4TB 3.5" SMR drives are about 25% thinner than typical 3.5" drives, which is another way to recognize them as SMR tech. These are fine for general data storage; things like photos, videos, documents, etc. SMR drives are not good for use as boot drives due to the many small file read/writes generated by the OS 'clashing' with SMR's inherent slow write, and especially re-write speed.
Unfortunately with the drives sold in USB enclosures, it's unclear which ones are SMR. More likely from Seagate, but I'm not sure about WD. It's not that the tech is unreliable, rather, if you're getting an 8TB+ drive and plan to transfer a lot of data to it, the transfer rate will be really slow.
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