How do i locate the missing files?
That appears to just be for a few seconds of the sync, not the whole thing, and it doesn't include an attempt to open a missing file, as requested in the instructions.
Per your suggestion, I tried to locate the missing data here: > Library >Application support >Zotero>Profiles> 56oasylq.default>storage.sqlite
a. zotero.sqlite 12.7 MB Created 4/28/2019 Modified: Today (10/8/2019) 9:00 pm
If you look in 'storage', how many folders are there, and are the folder modification times all from a given time (suggesting that you synced them all down from the online library at once) or are they spread out throughout the time period that you were working with Zotero?
I just tried to open zotero and it says that "Profile missing Your Zotero profile cannot be loaded. It may be missing or inaccessible"
Attachment file '/Users/[…]/Zotero/storage/Z43JSP86/[…].pdf' not found
The first time I encountered this problem was when I downloaded Zotero in my Desktop (PC) and upgraded Zotero storage. That was back in June 21, 2019. Before that, I had access to all 550 PDFs.