Below are steps and tips to follow if your Smart TV is not recognizing your USB drive:

1. Check formats and capacities – Ensure that the USB drive is compatible with the Smart TV in terms of format (e.g. NTFS, FAT32, etc.), file size and space capacity.
2. Reformat USB – Reformat the USB drive so that it can be read by the Smart TV.
3. Try different ports – Try connecting the USB drive to different ports on the TV to ensure that it is capable of recognizing any inserted devices.
4. Update firmware and drivers – Check to see if there are any updates or driver updates for your Smart TV that could help with USB recognition.
5. Consult TV's manual – Refer to the TV's manual or the manufacturer's website for more information about USB compatibility and recognition.