storage backup solution after file finished copy

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I have 2 types of storage: 1) permanent [p1,p2,...] 2) backup [b1,b2,...].

While system works, It generates huge files (size > 50GB) and they are copied to permanent storage.

I need a backup solution to copy each file or folder to backup storage after each file finished copy in permanent storage(not while file is copying in permanent drives).

and there is a kind of map between storages to find backup drive of each permanent drive:

p1 -> b1

p2 -> b2


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