Yes it applies to all drives partitions. You should only need Restore points for the Operating System Drive or Partition. If it's turned on for other drives it just wastes space also stops you being able to turn off the external drive
However, one other thing has occurred to me. A Maxtor One-Touch has Retrospect software bundled which can be operated by a touch of the button. I wonder if this is the "in use" culprit. Can this be disabled to check? I don't want to uninstall and I need to know how to reverse the diable action, please?
This thread is now locked and can not be replied to.