While you are recording, FlashBack will need somewhere to temporary store your recording. By default it will be C:\Users\<Your username>\AppData\Local\Temp\FlashBackTemp\.
If you only have limtied space available on your C: drive (if it is a small SSD, for example), you can select a new location by doing the following:
- Start the Recorder
- Click Settings
- Go to the Misc. tab
- Under the Temp Folder heading, enable the 'Use custom folder' option and then select the new location.