I am nervous that a file I need could be deleted from ProtonDrive and I may not realize it for months or years. Or I am afraid that files could become corrupted. It would be nice if ProtonDrive could implement some type of snapshot feature that would allow me to manually (and periodically) create a snapshot of my files and allow me to open and recover folders/files from a historical point in time.

Periodic options might be to retain snapshots for each of the last [3] days plus each of the last [4] Sunday 23:59, each of the last [3] month ends, indefinite number of quarter ends with the ability to cull them as needed. If snapshots are done on an incremental basis then hopefully the data requirement will not be high.