Ubuntu does not see eny external device

What format are/is the partition/s?
When you last unplugged it, did you safely remove it or did you just yank it out?

One is NTSF, the other one is FAT, and the pen disks all all FAT... I just tried everything on another computer running windows and the all work perfectly, as they did befor installing ubuntu. Sam goes with the DVD player, if I put i cd in it, nothing happens...

Just tried another pendisk that yesterday worked perfectly on my girls laptop, which is running ubuntu, and still nothing happens

When you unplug it, do you safetly remove the device or do you just pull it out?
I suggest you also chkdsk the partitions in Windows to be sure they are ok

everything done safely averytime.. but as I said I dont think is a problem due to my HD, since everything worked fine before and still does. It's just the software that does not see anything when I plug it..

Its worth checking, just to be sure

Checked it everything fine but still no sign of life forme any drive

When you plug it in, wait 10 seconds and run:

sudo fdisk -l; mount; lsb_release -a; uname -a

What is output?

Thanks

Disk /dev/sda: 300.1 GB, 300090728448 bytes
255 testine, 63 settori/tracce, 36483 cilindri, totale 586114704 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x000a9f74

Dispositivo Boot Start End Blocks Id System
/dev/sda1 * 2048 584017919 292007936 83 Linux
/dev/sda2 584019966 586113023 1046529 5 Esteso
/dev/sda5 584019968 586113023 1046528 82 Linux swap / Solaris

Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 testine, 63 settori/tracce, 121601 cilindri, totale 1953525168 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x3d19d086

Dispositivo Boot Start End Blocks Id System
/dev/sdc1 2048 1953521663 976759808 7 HPFS/NTFS/exFAT

Disk /dev/sdb: 2000.4 GB, 2000398931968 bytes
255 testine, 63 settori/tracce, 243201 cilindri, totale 3907029164 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0xeccad2a5

the HDs are the 1 and 2 TB

MOUNT

Disk /dev/sda: 300.1 GB, 300090728448 bytes
255 testine, 63 settori/tracce, 36483 cilindri, totale 586114704 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x000a9f74

Dispositivo Boot Start End Blocks Id System
/dev/sda1 * 2048 584017919 292007936 83 Linux
/dev/sda2 584019966 586113023 1046529 5 Esteso
/dev/sda5 584019968 586113023 1046528 82 Linux swap / Solaris

Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 testine, 63 settori/tracce, 121601 cilindri, totale 1953525168 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x3d19d086

Dispositivo Boot Start End Blocks Id System
/dev/sdc1 2048 1953521663 976759808 7 HPFS/NTFS/exFAT

Disk /dev/sdb: 2000.4 GB, 2000398931968 bytes
255 testine, 63 settori/tracce, 243201 cilindri, totale 3907029164 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0xeccad2a5

PARDON, MOUNT

/dev/sda1 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
gvfs-fuse-daemon on /home/leo/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=leo)

RELEASE

Distributor ID: Ubuntu
Description: Ubuntu 12.04.1 LTS
Release: 12.04
Codename: precise

UNAME

Linux MyComputer 3.2.0-31-generic-pae #50-Ubuntu SMP Fri Sep 7 16:39:45 UTC 2012 i686 i686 i386 GNU/Linux

But it still does not see the pen drive

With the Tb USB you can use:

sudo mkdir /media/1Tb; sudo mount /dev/sdc1 /media/1Tb -o rw,user,uid=1000

It should mount it

Ok the 1tb disk is now working
but for the 2tb disk this is what it says

Mount is denied because the NTFS volume is already exclusively opened.
The volume may be already mounted, or another software may use it which
could be identified for example by the help of the 'fuser' command.

as for the usb flash drive is still not seeing any, same with dvd writer

Ok I made it for the second HD to work... now just prolems with pendrive and dvd..... Is it possible to change the name I gave to the HD???

I suggest you add an entry for the 1Tb in /etc/fstab to make it mount. I suggest you run:

sudo blkid

and use the UUID of the partition, it will then be used each time.