Files Tripled and Attachments Not Synchronized
At the beginning, I Synchronized my Library on my new computer, to find my library full of doubled files, and without attachments. Then I chose to Export and Import my library to create the third copies. Is it possible for me to turn my whole Zotero into the very orinigal yet latest version on my old computer where all of my files exsit once and with their correct attachments?
Sort your library by Date Added and delete the sets of imported items, which will all have the same (two) dates.