[Why] does a partition "backup" "modify" the affected filesystem?

kde-partitionmanager-25.12.3-1.fc44 informs me that:

Why would this be so? I ask because I expect it to be an RO operation.

Context

For copies, you can use rsync. Each Monday I use:

rsync -avhP /home/krovikan/ /homeCOPIA/krovikan
rsync -avhP --delete /home/krovikan/ /homeCOPIA/krovikan

The first command is to do the copy (/home is /dev/sda1).
The second command is to clear in the copy (/homeCOPIA is /dev/sdb1) files that don’t exist anymore in /home.

Regards

if i understand what i’m looking at, you are cloning a whole partition and writing it to a file in your /home dir (didn’t even know you could do that)?

why what is your concern with with the warning?

it seems to me that it’s just warning of the write operation.

@skyfishgoo, it’s available via the “Backup” option:

I expected that the warning referred to the to-be-cloned partition.

I guess the warning appears for all operation in this thing, maybe the backup option wasnt even there back when this was initially made and the window doesnt check what you are precisely doing.