Okay-welcome to the Mac support forums, 1944 Bug. We are all users here just like you, helping each other out. From what you’ve written here, you want to get your Microsoft One Drive working & playing nicely with your new Mac. Step one :backup your files on the OneDrive if there’s anything you want to save. If not: use either Time Machine ( looks like a little round clock at the top rightish of the screen) or Disk utility to re-format and erase the drive, unless you want to be able to access your files on it on both Mac and PC, if not, go ahead and erase/format it: should be MacOsJournaled and GUID should be on. Then you can use Time Machine to set the drive as a backup, and even when to backup, or turn it on or off. It will do that automatically. Like OneDrive, that capability is automatically built into the OS. However If you want to leave it as Windows-formatted, you could try ExFat. Macs will will deal with NTFS drives, but not for free. You’d have to buy some software to do that.
Good luck
John Brine