I will not now, nor will I ever trust my personal files, work, art, or anything to the whim of some 3rd party.
All my data is stored on physically owned portable hard drives, flash drives, memory cards, CD's/DVD's/BD's, etc.
At most, I will only use 3rd party services to make something accessible for download. Like a game demo, or song that I made and want others to see and hear.
But never as a means of true storage or backup.