We've encountered an issue on the Mac where Adobe Creative Cloud (version 126.96.36.199) appears to be removing the contents of the first folder at the root of the drive, in alphabetic order. By happenstance, the first folder on most Backblaze customer's internal drive is the .bzvol folder. You can learn more about this folder and what it does in this article:
To correct this, please update your Backblaze client to our latest Beta version:
1. Go to http://files.backblaze.com
2. Download the Mac Beta Installer.
3. Restart the computer.
4. When the computer is up and running, open the installer and click install now.
This update will create a folder named '/.aBackblaze/ at the root of your hard drive, as a decoy folder to negate the Adobe bug.
If you are already receiving a warning from the Backblaze software about an issue with the primary hard drive, these steps will also need to be completed:
1. Open the Backblaze Preferences pane.
2. Select the 'Settings' button.
3. At the bottom of the pane are the drive selection settings. In those settings, two entries for the primary hard drive will appear, one selected and "unplugged" and the second unselected. Select the currently unselected entry.
4. You may receive a message that this action will replace the "old" drive. Confirm the selection and allow the drive indexing to complete.
5. Select the 'Ok' button to confirm the settings changes. When convenient, reboot the computer. After the reboot, only a single entry for the primary hard drive will appear in the Backblaze settings. The Backblaze software will require some time to reconcile with the existing backup, after which backups will resume normally, as scheduled.
**If you have any folders alphabetically before .bzvol, you may want to restore them from Backblaze.**
This issue is NOT limited to Backblaze customers. If you came to this page from an article and are an Adobe Creative Cloud customer that signed in after installing (or auto-updating) to version 188.8.131.52 please check for any folders on your root drive missing files. You can find a video of files being deleted even when Backblaze is not installed here: https://www.youtube.com/watch?v=Cnt4IvECa-I.