vatallyn Said:
"Removed files on desktop: I was trying to save space on my iCloud by unchecking the box "iCloud Drive" without realizing it would remove all the folders of my assignments on my desktop. How can I retrieve it back? Please and thank you!"
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Restore from a Backup:
Did you ever back up your Mac using Time Machine. If so, then restore your Mac to a backup that has this info. If so, at would then lay on the Desktop(or wherever else). So, create a Time Machine Backup, restore from the older one, get the data, and then restore from the new one you just create. Then, export the files to a flash drive. Once exported, reset your Mac from the Time Bacon Backup you just created.