Монтируется флешка только на чтение. Записывает только из-под рута. Debian Jessie, KDE. Вот мой fstab:
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda6 during installation
UUID=8c2e949a-0dc2-43a8-98da-584a9c62f1fc / ext4 errors=remount-ro 0 1
# swap was on /dev/sda5 during installation
UUID=bc70dbbd-71f8-4608-8555-a893ab8a3de7 none swap sw 0 0
/dev/sr0 /media/cdrom0 udf,iso9660 user,noauto 0 0
/dev/sdb1 /media/usb0 auto rw,user,umask=0002,noauto 0 0
UUID="AAA295A5A2957693" /media/DATA ntfs rw,nls=utf8,exec,gid=plugdev,umask=0002 0 0