How do I stop Dropbox backup from automatically backing up a file I'm working on?

Welcome to our Community, Larryc​. 

When referring to Dropbox backup, can you clarify if you’re using this feature? Are the files you don't wish to automatically back up located within your Desktop / Documents / Downloads / Home folder, or an external hard drive?

If not, please send over more details on what you’d like to accomplish and on your current setup. I'll be able to further help this way.

Keep me updated.

I did not get the answer I wanted.

when I’m working on a Dropbox spreadsheet it shows saved even before I’m finished working on the spreadsheet. I used to be able to turn of automatic save and the save it when I was finished with the file. I don’t see an option to turn automatic backup on and off.

I would like to wait until im finished before backing up the file.

Larry

If you are using the website or a mobile device to open the file Larryc​ then its not possible to turn off auto save. 

If its on your computer it will only save when you hit the save button.