Clone persistent folder

Originally created by @Revan343 on #10405 (Redmine)

Would it be possible to add the option to clone the persistent folder when doing a clone/install? Probably defaulted to off, for security reasons. It would greatly increase the ease of pre-upgrade backups.

Related issues

Is duplicate of #8812 (closed)
Is duplicate of #5301 (closed)

Edited May 15, 2020 by Ghost User

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