AppleID syncing issue

I deleted files from my Mac, but at the same time same files from another Mac with the same AppleID got deleted too. Also I got the backup for the files. But I want to change this for future. How to do it?

Also if I change the AppleID of my Mac then will the files and all data get erased on the other Mac too (there the AppleID will remain as the old one) as a result?

Solution 1:

iCloud is a sync solution, not a backup solution. Deleting from one device deletes from all, by design.

If you used two separate IDs, they would not sync at all. Each would be completely independent.

If you don't want syncing, you'd be best to disable it rather than attempt to use two separate IDs.
System Prefs > iCloud > iCloud Drive > Options… Disable everything except essentials like Contacts etc.

As it's a structure I've never used, precisely because I don't want the same data on all machines, I don't know what warnings you will get if you disable. Make sure at least one machine keeps the original data & make sure Time Machine is up to date.