Lost PDFs and need to repopulate
Hi all,
I'm having some issues with my Zotero online library. Last year, I lost a years worth of PDFs from my Zotero library. The reference records are all still intact, but the PDFs associated with them were apparently lost. Fortunately, I had backed them up on an external drive. One odd thing: the PDFs I attached to references for a single year (~2017) were lost. That is, I didn't lose any of the PDFs from 2016 or 2018. Curiously, when attempting to repopulate the PDFs from the external drive, when I add them first to the Zotero online library, and then refresh to repopulate, they appear in Zotero standalone, but not vice versa, even if I hit refresh in Zotero standalone.
I have two questions. First, how can I be confident that this won't happen again? Second, is there a way to repopulate the 2017 PDFs without manually adding them to my Zotero online library (since it's about 1000 items)?
Thanks for the help,
bookster808
I'm having some issues with my Zotero online library. Last year, I lost a years worth of PDFs from my Zotero library. The reference records are all still intact, but the PDFs associated with them were apparently lost. Fortunately, I had backed them up on an external drive. One odd thing: the PDFs I attached to references for a single year (~2017) were lost. That is, I didn't lose any of the PDFs from 2016 or 2018. Curiously, when attempting to repopulate the PDFs from the external drive, when I add them first to the Zotero online library, and then refresh to repopulate, they appear in Zotero standalone, but not vice versa, even if I hit refresh in Zotero standalone.
I have two questions. First, how can I be confident that this won't happen again? Second, is there a way to repopulate the 2017 PDFs without manually adding them to my Zotero online library (since it's about 1000 items)?
Thanks for the help,
bookster808
As dstillman said in your other thread, it's almost certainly not the case that your PDFs were lost online; Zotero doesn't just randomly delete data. They were likely never synced. The way to prevent this would be to watch out for any sync errors and if you want to be extra sure to occasionally test if you can open random PDFs online (though obviously that shouldn't be necessary).
But that's the past, and what I hear you saying is that it shouldn't happen in the future again. I think that's right, though it would be nice to figure out why it happened in the first place to guard against it happening again.
In terms of a solution for repopulating them, it sounds like there isn't an easy one. I do still have one question related from my post - why am I only able to repopulate things on Zotero online, but not vice versa, even if I hit refresh in Zotero standalone?
Thanks again, @adamsmith
As for The placeholders appear even if files never synced, so they don't mean anything.
For the remaining question: Could you say exactly what you're doing? How are you adding files and how are you checking for them online? Adding files locally and having them show up on the server should just work.
https://www.zotero.org/support/zotero_data
Which has a subfolder "storage"
From your external harddisk, copy over all the older folders into that folder (i.e. into the storage folder).
You'll likely get a conflict message. Select "Merge" from the option and check do this for all (the exact wording may differ depending on your OS).
Once done, check whether the PDFs open locally. If that works, go into the Zotero preferences under "Sync" --> Reset and select "Reset File Sync History"
Make absolutely sure you have selected that option and not the "Restore to Online Server on", then click the Reset button, which will cause Zotero to check for each attachment that it's properly synced online.
This is a one-time step, don't use the reset option in the future.