I was recently giving a workshop on Zotero and I downloaded to Zotero all the results in a search I did in Scopus. All the entries came with the PDF of the articles and this consumed my storage. After the workshop, I proceeded to erase the folder (and its files) from Zotero but I still have no storage room. I've been trying to erase even more files, but with no result. The storage warning still appears in the syncing button of Zotero. Any ideas? Thanks!