Cheap USB C flash drives from MSY. Out of stock for delivery, however, it seems pickup is still available.
SanDisk ULTRA USB-C Type-C (SDCZ450-064G) 64G $9 kudos to mrbargainhunter
- The flash drive for USB TypeC Devices
- Highspeed USB 3.1 performance of up to 150MB/s
- Superthin; retractable design to protect the small USB TypeC connector