McAfee Online Backup lets you back up files from drives other than the internal ones on your computer. The process of backing up files from these drives is the same as for internal drives with some considerations.
In Windows, McAfee Online Backup can only work with drives that the operating system considers fixed or mounted; this can include some external drives that are directly connected. McAfee Online Backup cannot work with flash, thumb, or memory stick type drives. If you are backing up more than one external drive, ensure that each drive uses a unique drive letter and name. If needed, you can change the drive letter or name of an external drive. After a drive letter or name change, McAfee Online Backup updates your file path and other drive information.
You can disconnect an external drive after backing up files, but regularly reconnect it to ensure file integrity and that any file changes are backed up. When the drive is disconnected, files remain backed up in the McAfee cloud but consider these files a backup copy, not the only copy, of the original files.
You can also back up network drives if your administrator has enabled this functionality for you.