Some people on the forum recently reported this works fine for the OBi202, others suggest it is no longer supported by the firmware.
HardwareVersion 1.4
SoftwareVersion 3.2.2 (Build: 5921EX)
I plugged in a USB flash drive (FAT32 format), configured file sharing via the obitalk.com portal for my OBi212, then rebooted. Navigating to http://<obi-address>/obi_share results in: The requested URL was not found!
I used the OBi Device Administration Guide (for Obi202), since I could not find one for the 212. I'm using Bridge mode. Sharing access from WAN is enabled.