Sometimes the TV just needs a proper reboot, not just a sleep/wake cycle.
If the TV doesn't see the drive, unplug it, turn off the TV for 5 minutes, turn it back on, and then reinsert the drive. Method 3: Alternative Access via Web Browser file manager on hisense vidaa smart tv fixed
The most common reason the file manager fails to appear is that the TV cannot read the USB drive's format. VIDAA is strict about file systems. Sometimes the TV just needs a proper reboot,
: Unplug the TV for 5 minutes and hold the power button for 30 seconds to clear temporary glitches that might prevent USB detection. App Availability & Alternatives turn it back on