Thank you Thomas.
my passwords do not resemble "password", but I hope someone here can help me with my wee problem.
I have a problem with my MacBook Air.
Simply put, it is full.
I tried transferring info and files to my external hard disk drive. The problem still remains.
I noticed that if I link the two, one of the two devices is transferring stuff from the external drive to the iMovie, undoing all my hard work removing these exact same files from MacBook air, and, yes, I deleted the Projects that used these movie files from my iMovie?