Time Machine needs more space than the internal source drive to backup?

Looking at your screen shots, there isn't enough space on the external drive. There needs to be more space than the amount of data you are trying go back up. See the suggestion below.

http://oldtoad.net/pondini.org/TM/1.html

Hello Michael Stancato,

Thanks for using the Apple Support Communities! I understand that you are having an issue with your Time Machine backup space. I'm happy to help you find information.

Here are a few resources that can assist you:

If the Time Machine backup disk for your Mac is full

About Time Machine local snapshots

If you have any issues after reviewing the links, please let me know.

Have a great day!

You are welcome.