Simplify the following text for a Grade 6 native English-speaking person.
Original: The 250 MB drive writes much more slowly to 100 MB disks than the 100 MB drive , and is unable to perform a `` long '' ( thorough ) format on a 100 MB disk .
Simplified: However , it is slower to write data on a 100 MB disk with a 250 MB Zip drive than with a 100 MB Zip drive .