Final answer:
The two storage locations from the provided list that can be selected for Backup using File History in Windows 10 are the USB flash drive and a drive mapped to a network share. OneDrive, OneDrive for Business, and a secondary partition on the system drive are not supported for File History backups.
Step-by-step explanation:
When configuring Backup using File History in Windows 10, you have the option to select different storage locations to save your backups. File History is designed to back up to external storage devices or network locations. The two storage destinations from your list that can be used with File History are:
- The USB flash drive.
- A drive mapped to a network share.
File History does not support backing up to OneDrive or OneDrive for Business directly, as these are cloud storage services not meant for this type of system backup. Also, File History cannot use the same drive that Windows is installed on, which includes a secondary partition on the system drive. Therefore, options 'a' and 'b' are incorrect, while 'c' and a drive mapped to a network share are correct solutions. It's essential that the external storage device, like a USB flash drive, has sufficient space to store the backups.