Delta Drive, Delta Trust & My Drive · Delta Drive on your Mac
Why did my Finder favourite to Delta Drive stop working after I switched drives?
Short answer: The Finder folder is named after your active drive — Delta Drive, or My Drive and your storage's name — so a favourite or alias to the old name stops working after a switch. Nothing moved; make a new favourite.
Because the folder is named after your active drive. Inside the Storage Studio location in Finder it's called Delta Drive while Delta Drive is active, and My Drive followed by your storage's name in brackets while your own storage is active. A Finder sidebar favourite or an alias points at the old name, so it stops working after a switch — and one made to the new name stops if you switch back.
Nothing inside either drive has moved, and synced and linked folders on your Mac are unaffected. Drag the newly named folder to Finder's sidebar to make a fresh favourite.
See switching drives.