I cannot delete files, when I tried to delete the file, this message appeard:

"Error while deleting. There was an error deleting file2.rar."

This is what I get from clicking on SHOW MORE DETAILS:

"Error removing file: Read-only file system"

This is what I've tried so far:

• delete from the downloads directory from my user.
• deleting permanently, but it does not work.

EDIT

When trying to remount it as read/write I get this error:

 jianyue@jianyue:~$ sudo mount -o remount,rw /media/A88F-8788  
 [sudo] password for jianyue:  
 sudo: unable to open /var/lib/sudo/jianyue/1: Read-only file system  
 mount: can't find /media/A88F-8788 in /etc/fstab or /etc/mtab