Uploading FPKG saves to PSN - risk of ban?

I have some saves from games I played on a 6.72 console as FPKGs that I want to upload to my PSN account. The end goal is to be able to keep playing them on a PS5.

I think I have found out a way to do it (but it means I have to waste a hackable console):
1. Make sure the PS4 I want to waste have all FPKGs installed with the saves I want to upload (I have to import the saves via PS4 Save Mounter since I am not wasting my main console).
2. Update to latest firmware.
3. Log in to PSN.
4. For...

Uploading FPKG saves to PSN - risk of ban?