I copied tons of files from an old PC (now gone) to my Galaxy S7. All files copy from the S7 to a new PC perfectly except for specific pdf files. There is no error message at all, the copy activity just stops. So I go through folder by folder to determine where the copying broke down and when I find the offending file I open it, save it manually to the new PC and restart the copy. Again, the copy will proceed until it reaches another specific pdf file (some pdf's copy without issue).
I read on another forum (unrelated to Droid) that it is a permissions issue (based on the app that created the pdf) which can be fixed by adding the "Everyone" group in the Security tab. I'd love to do that except on the Galaxy the "Security" tab is replaced by a "References" tab which seems to be of no value to my situation. It will take me forever to finish the copy if I have to do it manually.
Could someone point me to a forum where someone might be able to help? A million thank you's!!