Deleting attached files in group library only
I accidentally uploaded attached files to a group library (because I have just switched to a new computer, and failed to change the preferences to stop syncing of attached files before syncing). In fact, these files should not be made available to other group members, for copyright reasons. But I can't find a way of deleting attached files in the storage space only - that is, in effect to undo what I did by syncing them. Is it possible to do this? I don't want any files stored at all, so would be happy to empty the storage space of all attached files.
Otherwise, if I copy the citations to My Library, delete them from the Group Libraries, then delete the attachments under My Library, and finally move them back into Group Libraries, will my citations still be valid in Word? I need to free up some Zotero storage space, but I am worried about having to recite old papers if I do this. I don't really need the groups anymore, but I need the citations to remain valid, so if I could just copy the citations to My Library and have them remain valid, that would work also.