FULL HDD : Urgent

I have 320 GB SATA HDD.
When I checked my phpsysinfo, it shows 95% HDD is filled.
Should I delete all my recordings though I don't need them an I keep them downloaded daily ?
If yes, how to delete all recording ?
[root@vicidialnow GSM]# rm *
-bash: /bin/rm: Argument list too long
[root@vicidialnow GSM]#
Plz help as my server is down.
When I checked my phpsysinfo, it shows 95% HDD is filled.
Should I delete all my recordings though I don't need them an I keep them downloaded daily ?
If yes, how to delete all recording ?
[root@vicidialnow GSM]# rm *
-bash: /bin/rm: Argument list too long
[root@vicidialnow GSM]#
Plz help as my server is down.