How much disk space does System Restore require?

Well simple answer is  you need at least 300 megabytes (MB) of free space on each disk that is 500 MB or larger.

“System Restore might use between three and five percent of the space on each disk. As the amount of space fills up with restore points, it deletes older restore points to make room for new ones. System Restore doesn't run on disks smaller than 1 gigabyte (GB). To learn more about how System Restore works, see What is System Restore?

read more about System restore and how to manage disk space that it uses

System Protection

Rob

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