Multiple Probs: Insufficient Resources, FS Check, etc.

Ok, slowly my unix is getting back to me...

Here's what I got:

NAS:/#  du -ch  --max-depth=1
16k     ./lost+found
2.4M    ./bin
596G    ./c
48k     ./dev
5.5M    ./etc
532G    ./home
1.0k    ./initrd
48M     ./lib
4.0k    ./mnt
3.3M    ./opt
du: `./proc/2820/task/2820/fd/4': No such file or directory
du: `./proc/2820/fd/4': No such file or directory
2.6M    ./proc
96k     ./ramfs
52k     ./root
2.7M    ./sbin
0       ./sys
96k     ./tmp
0       ./USB
130M    ./usr
33M     ./var
4.0k    ./Folder
4.0k    ./Remote
1.5G    ./SeagateExt1-mA8jHF
84M     ./SeagateExt1-my6dUQ
480k    ./SeagateExt1-m3MDjg
12M     ./frontview
4.0k    ./Watcher
1.2T    .
1.2T    total

Pretty much what to expect, except for the 3 SeagateExt1 directories. One is 1.5Bg...

I had once a 500MB Seagate that I called SeagateExt1, but now I upgraded to a new 2Tb drive and it's now called USB_HDD_1...

Lets check what's inside...

WEIRD!
Looks like some sort of temporary folder. Inside there is the content of an old share that IS on the new external drive... It also looks like that some symlinks are bad...
For example, ls -la shows:

lrwxrwxrwx    1 root     root           12 Feb  5  2009 Seagate -> /USB/Seagate

But when I go into /USB and I ls:

drwxrwxrwt    3 root     root           60 Jul 19 22:34 .
drwxr-xr-x   28 root     root         4096 Jul 19 22:34 ..
drwxrwxrwx    4 root     root        16384 Dec 31  1969 USB_HDD_1

Mmmm, my guess is that those 3 SeagateExt1 are safe to remove, once I check I have the content somewhere else. What do you think?