Time Machine only backs up files on your local computer. but if you have a local dropbox directory. you should remove it from TM backups.
Dropbox can’t sync files that are outside of the Dropbox folder. Dropbox can only sync the files that are in the Dropbox folder, or in the Dropbox mobile apps. After moving a file or folder into Dropbox, you can create a shortcut in the original location to access the files from there. However, this doesn't work the other way around. I'm using Dropbox Plus in conjunction with Time Machine on a Mojave MB Pro. My Time Machine is configured to backup the data in my Dropbox folder. I like having a local as well as a remote backup of. Currently, Time Machine cannot upload to iCloud, DropBox, Google Drive or OneDrive. However, it can back up to external drives, flash drives, and network attached storage (NAS). Why Time Machine is slow The slowness of the Time Machine can be caused by multiple factors. Dropbox can’t sync files that are outside of the Dropbox folder. Dropbox can only sync the files that are in the Dropbox folder, or in the Dropbox mobile apps. After moving a file or folder into Dropbox, you can create a shortcut in the original location to access the files from there. However, this doesn't work the other way around.
See http://www.noproblemmac.com/blog/2013/04/01/how-to-exclude-items-from-a-time-mac hine-backup/
Dropbox and similar type setups can use a local mega size file. this file is say 20GB. every time it changes with the addition of 2KB file or 10GB file, TM will do another backup. this means TM will rapidly run out of space and you will have huge numbers of useless dropbox backups.
Any virtual disk file which is used as a container should be backed up as a separate item and removed from TM which does not work well with these.
Oct 25, 2014 1:46 PM
Have you ever wished you could go back in time and look up an old version of a document or recover a deleted file? Never worry again! Dropbox keeps snapshots of every change you’ve made over the last 30 days, so you can view past edits and restore any file you need.
And if you use Dropbox Pro or Dropbox for Teams, you’ll have access to Packrat, a feature that saves your file history indefinitely, so you can always return to a previous version. Here's how:
Keep track of changes on the Events tab
Time Machine And Dropbox
On the web, check out the Events tab to see every change made in your Dropbox, including when you’ve created, edited, or deleted files or folders. How do i clear memory from my iphone. All actions are logged as soon as they occur, and you can always review the edits you’ve made. If you're in a shared folder, you'll also be able to see changes made by other members of the folder, too.
Restore previous versions of your files
In addition to keeping track of all actions, Dropbox records the changes to a file every time you save! So, if you need to go back in time, you can view previous versions of your ﬁles for 30 days (or indefinitely if you have Packrat). To view a previous version on the web, right-click (or Ctrl+ click) on a ﬁle and select ‘Previous versions.’ From there, you can choose to either download or restore an earlier version of your file. On your computer, right-click (or Ctrl + click) the file from your desktop and hover your mouse over 'Dropbox' and select ‘View Previous Versions.’
Undelete ﬁles if you need them later
Time Machine And Dropbox Free
If you delete a file and realize later that you need it again, you can restore deleted files for 30 days (or forever, with Packrat)! On the web, click on the trashcan in the upper right hand corner to show all deleted ﬁles within that folder, then right-click (or ctrl-click) on a deleted ﬁle and choose the ‘Restore’ option.