1st I would upgrad the kernel - that is a quite old kernel with redaht 7.1, and a newer kernel may help. i assume usb-storage is loaded as a module.
for non-root users edit fstab and add owner to the entery of people able to mount it
assumes of course that it is tied to /dev/sda0Code:/dev/sda1 /mnt/flash/ vfat noauto,owner 0 0
hth - and welcome to linux junior