Slate AR750S USB to LAN speed


what is your usual read/write speed from USB or Micro SD to LAN (Wifi 2G/5G)? In MB/s (Megabytes per sec). Is it feasible to use the router as a pocket personal NAS (SAMBA, FTP, torrents)? Thank you.

The wireless sharing rate is about 2-3MB /s, and the cable can be 4-6MB /s