You can set notifications to find out when your collaborators have modified your spreadsheets, and learn what sheets or cells they've modified. You can also choose how often you'd like to be notified.
If you are mostly using only one resample image option when resizing images, then you can change the default option to the option you are using the most.
Let me show you a nice little Chrome trick which I personally find very useful. You will learn how to save all the open tabs so you can view open and view them any time later.
You deleted everything from your USB key or a drive, so there should be enough free space to copy the new files, but you still get the not enough free space message in Mac OS X? This is what you need to do.