My 486 (PCI system) had a 1GB HDD when most computers were sold with less than 500MB HDD. This was in '96. About 2 years later I installed a second 4GB HDD. The

My 486 (PCI system) had a 1GB HDD when most computers were sold with less than 500MB HDD. This was in '96. About 2 years later I installed a second 4GB HDD. There were no compatibility problems, HW or SW.