@KAPPY and @TYGB :Pls pls CHANGE or EDIT YR ANSWER as Kappy's steps are a massive "fluster cuck", A HUGE TIME SUCK & not even the FIX for this MADDENINGpain in the butt issue which I also lost my mind over. I too lost my ability to DRAG and DROP any folder contents when migrating & ** even had to COPY/PASTE contents into new folders manually which created dupes & my storage went to ****...THE FIX is a quick click.
- Yes, go to System Preferences
- Then to TRACKPAD- not ACCESSiBILITY as this is NOT accessibility issue!
- UNCHECK the "Force Click & Heirtics" box which is checked by default in the High Sierra update i think.
- This allowed me to instantly GRAB, DRAG & DROP again without all that other jibbity jab mess! U do not need to even go IN to Accessibility settings at all to restore yr DRAGGING ability.

**(In my attempt to drag them to MOVE em like before, i'd SELECT ALL contents in a folder, click to drag & it would select only the 1 file/flder the curser physically touched-UNselecting all Id just highlighted & BURST the 1 item into a QuickLook window, not allowing a drag at all)
