I use the Glowforge full-time.
My process is mainly to upload the files as I need them and keep a few key files saved on the home screen.
Just in case you didn’t know, you can always go back to the home screen and upload a file while another one is running. No idea how long your jobs are - mine average 25 minutes. It’s more than enough time to set up any files that I’ll need for the day.
We’d all like and enjoy better file management but that is just one easy workaround as far as efficiency is concerned. If you want to check the status of whatever is printing, just hit the print button and it will pull up the timer/job status.