Steam doesn't do anything with one drive. Also what is being saved their specifically? If we're talking game saves and configs, those are managed by the games themselves, not Steam.

At any rate there's some missing details here you should elaborate on if you want better than random guesses.

uninstall onedrive if you dont use it

some games save their saves and configs in windows user files
which is what windows clones to onedrive, and restores when missing or deleted

then log into ms onedrive and delete all your stuff
https://onedrive.live.com/?view=0

引用自 _I_：

uninstall onedrive if you dont use it

some games save their saves and configs in windows user files
which is what windows clones to onedrive, and restores when missing or deleted

then log into ms onedrive and delete all your stuff
https://onedrive.live.com/?view=0

Windows tries it's darndest to prevent that. You need to change ownership permission over the system folder and delete the executable. And maybe set the folder as read only for good measure, but then Windows Defender might identify it as a malicious action and revert it.

引用自 samisomsam：

How do I get Steam to stop saving to OneDrive when I have already disabled OneDrive on my computer, it is no longer in my bottom right tray, and I cannot search for it?

It's not Steam saving there, but your games doing it. It means you haven't actually disabled One Drive at all. If you can see OneDrive in the file explorer then it is still on.

You should be able to disable it from the file explorer.

if I remember correctly I removed onedrive with Windows debloater

onedrive changes the default location for 'documents' and all other personal folders. open properties of documents and look at the 'path' tab

when you have sync enabled you have to disable that before you block onedrive from startup or uninstall. then it will reset it to default folders in your profile folder