How to sync without losing data

#1

I have 2 computers that i want to sync with OneDrive using rclone. Assume that I created file A on pc1, file B on pc2 and then synchronized both to onedrive (now onedrive has A and B). See:

pc1 | pc2 | drive
A | B | A B

Now when i create file C and delete file A while offline on pc1. (see below)

pc1 | pc2 | drive
C | B | A B

how do i sync it without losing data (i want both pc1 and server to have B and C)?
how to make:

pc1 | pc2 | drive
B C | B | B C

Note: If i sync server to pc1 file B will be lost. If i sync pc1 to server changes on pc1 are lost.

#2

Rclone doesn’t do two way sync which is essentially what you are asking for.

You can use the copy verb instead of sync. This will never delete data. It isn’t a perfect solution though as deletes won’t propagate, but you won’t lose data.