Why do my backups to Dropbox keep failing?
There are a few potential issues:
The backup was not created
Read up on the why backups fail FAQ.
File size
Dropbox has a 300MB upload filesize limit (read more on Dropbox.com). If your backups are bigger than this try the following:
- consider excluding some folders
- switch to Amazon S3 backup
You should also check your remaining space on Dropbox.
Script Timeouts
Try increasing the PHP execution time.
Error Message
You may be getting the following message:
Error: Cannot execute request: SSL certificate problem, verify that the CA cert is OK. Details: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verification failed
This can mean one of the following:
- the Certification Authority (CA) that Dropbox uses for their SSL certificates is not installed on your system
- PHP/cURL is not configured correctly
If you are the system administrator or have hosting support, try installing the CA certificates bundle to a system-wide location. If you use a package management system, this will ensure that they are kept up to date automatically. On Debian Linux for example, you can install the package ca-certificates.
Other users should ask their hosting provider to take care of this.