[dba-Tech] hidden files?

Hello:

windows xp home edition

one of the basic partitions of my computer reports 1.5GB of used space but 
when I open up that partition, there are no files there (except for the 
system folders RECYCLER and System Volume Information; there is nothing in 
the recycler folder but I can't open the System Volume Information folder).  
any thoughts?  I am thinking of deleting this partition but am having 
seconds thoughts.

thanks in advance

Billy