Problem : USB disk/storage devices are auto loaded as Read Only in Ubuntu. When attempting write operation it gives the message like “Read only file system…”.
Reason: Unknown, looks like a bug in the usb disk handling in Ubuntu.
Fix: Run this command to remount as writable disk –
sudo mount -o remount,rw /media/<username>/<diskname>
(Pressing tab after /media/<username>/ can help you find the disk to be provided.)