Uninstall directions for linked attachments setup:
1) Zotero>Preferences>Sync>
Under file syncing, re-select: Sync attachment files to Zotero
2) Zotero>Preferences>Advanced> Files and Folders
Under Base Directory:
Choose “Revert to absolute paths”. This will give you a dialog box. Saying yes will convert them back
Clear/delete path in base directory so that it is blank:
3) Tools> Zotfile Preferences>General Settings>
Source folder for attaching new files back to blank:
4) Tools>Zotfile preferences> General Settings> Location of Files
Reset to:
Attach stored copy of files
Clear/delete path that is in custom location bar
5) Sort Zotero library by attachments.
Highlight/ Select all items with attachments:
6) Zotero>Tools> Manage Attachments
Choose “convert linked files to stored files”:
The links will turn back into PDFs: