Match the interface end to end
Check the drive, cable and host port standards together. Read any conditions attached to the maximum transfer figure rather than treating it as the speed of every file copy.
Choose external storage by real host compatibility, capacity and your backup workflow.
Start with the files you move and the ports on your computer. A fast drive cannot establish the speed of the whole connection, and a single external copy is not a complete backup plan.
Check the drive, cable and host port standards together. Read any conditions attached to the maximum transfer figure rather than treating it as the speed of every file copy.
Allow room for the files you keep active and the way your software manages them. If the drive is shared between operating systems, check the file-system requirements first.
Read encryption and password recovery details if used. Keep an independent copy of important data and check the warranty terms without assuming they include data recovery.