[ocicat]

Originally Posted by lucas34

My pen drive has 8GB.
So I think it would be sd0e,right?

No.

• As jggimi has stated (& as seen in the output of dmesg(8)...), your USB device is connected as sd1.
• Next, use disklabel(8) find the correct partition to mount:
  
  $ sudo disklabel sd1
  
• If this USB drive is formatted as MS-DOS, usually this will be assigned to partition "i".
• Once the correct partition has been identified, mount it with the following command:
  
  $ sudo mount -t msdos /dev/sd1i /mnt
• Upon success, you should now see this in the output of df(1).

Partitions for foreign file systems are identified by the following algorithm:

1. If not already assigned, pick the midpoint between "a" & "p" (which is "i").
2. If partition "i" is already assigned, use the next available letter.