taking a photo uploads it to OneDrive, so now you have a backup! Your phone probably has less space available than OneDrive or your PC, so it doesn't push media to your phone.
Careful now - using OneDrive as "backup" can end in tears. It's not (in itself) a backup solution - delete a file in a OneDrive folder and it's gone from all synchronised locations.
Careful now - using OneDrive as "backup" can end in tears. It's not (in itself) a backup solution - delete a file in a OneDrive folder and it's gone from all synchronised locations.
It is retrievable from the recycle bin - if not on the PC, it can be retrieved from the website's recycle bin.
even then its smart to have multiple backups.
and it wont be deleted from all sync'ed locations if one is disconnected from the internet at that time.