Where SuperSpeed 10Gbps/20Gbps, USB4, or Thunderbolt are of value is with the aforementioned RAID hard drive setups, or more likely-an SSD. Because of that, you’ll never see one rated higher. No hard drive, unless combined with other drives in RAID 0 or above, can saturate even the 5Gbps interface (roughly 500MBps real-world after overhead). For the sake of brevity (and our sanity), we generally shorten those to, for example, USB 10Gbps, 10Gbps USB, 10Gbps etc.Īll USB hard drives use a slower standard, typically USB 5Gbps. The USB Forum has changed its nomenclature to indicate throughput speed-SuperSpeed USB 5Gbps (formerly USB 3.x gen 1), SuperSpeed USB 10Gbps (formerly USB 3.x gen 2), and SuperSpeed USB 20Gbps (formerly USB 3.2 2×2). Ignore the version number (3.x) and look for the speed. However, USB comes in many speeds: 5Gbps, 10Gbps, 20GBps, and-eventually with USB4-40Gbps as with Thunderbolt 3/4. The vast majority of external drives today are USB drives. Then again, if you really want rugged–go the SSD route. The latter is designed to take bumps in a laptop, even when powered up. While a desktop hard drive (read 3.5-inch) provides far more capacity (up to 26TB currently if you’re a data center), it also requires a power cable, weighs more, and generally won’t be as shock resistant as a portable 2.5-inch hard drive. I.e., the larger the capacity, the more backups over a longer period of time you can keep, or the more PCs you can back up to the same drive. If you have 1TB of storage in your PC, a 2TB drive allows you to make a full backup while keeping previous versions, as well as additional differential and incremental backups. So how much storage do you actually need? For backup, we recommend a drive that’s at least twice the capacity of the total amount of data residing on your PC’s internal storage. ![]() But it also means higher total cost, and not everyone needs maximum capacity. The best “value,” as you can see, typically means the most capacious hard drives. ![]() The worst value for an external hard drive is typically the lowest-capacity drive.
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