USB drives compatible with Vortex
USB Drives must be formatted to FAT or FAT32 file systems, or they wont be recognised by the Vortex. The maximum drive size is 32GB (larger drives can only be formatted in NTFS or exFAT file systems which are not supported).
Very early Vortex8 models had a software bug causing them to not recognise a wide range of USB devices. This has been resolved in more recent Vortex versions; however, you may need to try multiple different drives from various manufactures if you are unable to upgrade the software.