Apps
Dropbox…Dropbox
● Safe to close
Syncs your files with Dropbox.
What it is
Keeps your Dropbox folder in step with the cloud.
Why it might be busy
After adding or changing many files. Usually until syncing finishes.
If you close it
Syncing pauses until you reopen it. Nothing is lost.
The verdict
● Safe to close. An app you can quit with ⌘Q. Save your work first if it asks.
In Activity Monitor
Dropbox…
… means any name that starts this way.
From Procession’s guide, in the words the app shows.