Mixxx does not have any time-based garbage collection that would take place after an hour... some sort of power saving on the USB stick seems more likely. Does your OS have an option to power down inactive hard drives? Maybe try disabling that.
Mixxx does not have any time-based garbage collection that would take place after an hour... some sort of power saving on the USB stick seems more likely. Does your OS have an option to power down inactive hard drives? Maybe try disabling that.