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Tool 02 · free

Drive Sizer

How big a backup drive to buy, so it still has room in a few years.

Your files

Backup programs such as Windows File History and Time Machine keep older versions of changed files, so they need more room than the files alone. Several computers backing up to one drive: add their files together.

Your drive size appears here

Common sizes: 1, 2, 4, 5, 8 TB and up. The sizer rounds up to the next one.