Hi,
@TheDreamsWind
I will post instructions that I shared with bananadon
1. Format the drive with MacOsJournald-GUID with NON-case-sensitive (the basic version)
2. Go into applications folder in macOS, search for OneDrive, right click, show package content, content, resources, execute: 1. removeonedrivecreds.command 2. resetonedrivestandaloneapp.command
3. delete the OneDrive app using some third party software
4. install an open source firewall like Lulu.app https://objective-see.org/products/lulu.html
5. download an older version of OneDrive and install it: https://www.manageengine.com/products/desktop-central/software-installation/silent_install_Microsoft-OneDrive-for-MAC-20.169.0823.html
6. block just the "OneDrive updater' using Lulu.app (for example)
7. connect to your Microsoft account and select the external drive
8. once on drive starts to sync to the external drive you may unblock the OneDrive updater in Lulu.app
9. you will be able to add new external drives even after OneDrive updates