Copying large numbers of files from external disk

[Doug O]

In the process of migrating from old to new computer I copied a large number
(80,000+) of files onto an external drive with WIndows XP (no problem). Now I
want to copy them to the new computer but get "Could not find this item.
This is no longer located in ..." It says this for about 60,000 files. If I
do smaller pieces at least 20% cannot be "found". Is Vista unable to more
than a handful files at a time?

 

[Doug O]

Further info: I can duplicate problem by trying to copy a single 452 MB file!!

 

[DL]

Are these data files or?

Further info: I can duplicate problem by trying to copy a single 452 MB
file!!