[Leica] OT: Technical Question on Backup External Hard Drives

[rmcclure2 at woh.rr.com (Rob McClure)]

Hello,

Here's a question for your computer techies out there.  I recently 
acquired a large-capacity Seagate external hard drive and back up my 
entire Mac iBook G4 hard drive every few days.  However, the hard drive 
on the Mac is over half full and is really sluggish when using iPhoto 
(more than 4,000 images).  I'd like to delete the albums on iPhoto and 
keep my entire collection on the Seagate.  I can't figure out how to do 
this as I'm afraid that the external drive will mirror my deletion of 
the internal Mac drive the next time I do a back up.  The,  
instructions which came with the Seagate were totally inadequate in 
this regard.  Thanks!

Regards,

Rob McClure
Upper Sandusky, OH