Errors copying photos to 1 GB memory cards

I have 323 Objects representing 236MB of memory. I try to copy and paste
to a 1.0GB SanDisk Memory Stick PRO Duo but it only takes 211 objects at
140.2MB of memory. I've tried several different methods including copying
a photo at a time from my hard drive to the memory stick. When it reaches
a certain point it won't allow me to add any more. I get the following
error message: Cannot copy "name of file": The directory or file cannot be
created.

I have another 1GB SD card and have essentially the same problem. What am
I doing wrong? How do I store 1 gig of stuff on these 1 gig cards?

Thanks,
Monica

-- 
Monica Mack RCDD, System Design Analyst & Project Coordination
UC Berkeley, IST-Infrastructure Services-Network Services & Operations
2484 Shattuck Ave. MC1640, Berkeley, CA 94720-1640
(Ofc) 643-8605, (Cell) 418-5886, (FAX) 642-4068
mouse_at_berkeley.edu
CNS Home Page:		http://cns.berkeley.edu/
CNS Standards Documents:	http://cns-oir.berkeley.edu/standards/
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