How do you recover a file from offline folder

My offline file will cannot replicate to Server, missing link or path that’s why it’s having error.

In order to backup the file that was offline went to Synchronization then Properties, there it’s displayed the local files that won’t replicate to the Server. Copied it then reset the Offline files, by pressing Shift + Control then delete offline files, then did a reboot.

Then tried to do the sync and it’s now synchronizing with our Server, but I’ve notice that there are some files that I haven’t backup on my offline files, How do I recover the one that was there before?

Thank you in Advance.

Ghed