As root, Create udev rule:
vi /etc/udev/conf.d/rules.d/75-my_usb.rules
SUBSYSTEM=="usb", SYMLINK+="my_usb", MODE="0666"
Connect the usb and Get the block assigned
dmesg
==>
[ 9882.238491] usb-storage 1-1:1.0: USB Mass Storage device detected
[ 9882.238607] scsi host5: usb-storage 1-1:1.0
[ 9883.247574] scsi 5:0:0:0: Direct-Access SanDisk Extreme 0001 PQ: 0 ANSI: 6
[ 9883.248043] sd 5:0:0:0: Attached scsi generic sg2 type 0
[ 9883.462147] sd 5:0:0:0: [sdb] 122544516 512-byte logical blocks: (62.7 GB/58.4 GiB)
[ 9883.471580] sd 5:0:0:0: [sdb] Write Protect is off
[ 9883.471585] sd 5:0:0:0: [sdb] Mode Sense: 53 00 00 08
[ 9883.482132] sd 5:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 9883.536495] sdb: sdb1
[ 9883.582602] sd 5:0:0:0: [sdb] Attached SCSI removable disk
The block assigned is sdb1
Create folder for the usb filesystem
mkdir /media/usb
mount /dev/sdb1 /media/usb
Safely disconnect
umount /media/usb