I'm running out of space, so I tried to increase root size using this link:

Increase size of root partition after installing Ubuntu in Windows

Here is the output

Filesystem     Type      Size  Used Avail Use% Mounted on
/dev/sda7      ext4      6,2G  5,6G  308M  95% /
udev           devtmpfs  965M  4,0K  965M   1% /dev
tmpfs          tmpfs     389M  892K  388M   1% /run
none           tmpfs     5,0M  4,0K  5,0M   1% /run/lock
none           tmpfs     972M  440K  971M   1% /run/shm
/dev/sda5      fuseblk    12G  6,1G  5,8G  52% /media/Ubuntu
/dev/sda2      fuseblk   278G  260G   19G  94% /media/AC4CC70D4CC6D16E

I tried to allocate 16Gb in the host (/dev/sda2 which is windows 7 partition).

When I get to the \ubuntu\disks folder, I only get the "new.disk" file which weighs the 16Gb allocated and not the "root.disk" file too. Also, the /dev/sda7 size doesn't increase.

Could you please help me? Many thanks