Can I connect OneDrive to Storage Studio?
Short answer: OneDrive isn't an account type you can add right now. Use Microsoft's OneDrive app, which keeps a OneDrive folder in Finder, and work with that folder in Storage Studio — for example by adding it as a Local folder account.
OneDrive isn't one of the account types you can add in Storage Studio right now. You can still work with your OneDrive files through Microsoft's own OneDrive app, which keeps a OneDrive folder in Finder.
To use that folder with Storage Studio, add it as a Local folder account (it gives a folder on your Mac a nickname so it can be picked in transfers), or simply choose it as an ordinary folder. Bear in mind OneDrive may keep files online-only, so they download when read. See Local folder accounts.