Complex sentence: All of these products had a following during the era of small hard drives, but a combination of shrinking Mac marketshare, changes to the underlying filesystem and ever-increasing drive space eventually killed off this product niche.
Split into simpler sentences: All of these products had a following during the era of small hard drives. Eventually, a combination of shrinking Mac marketshare, changes to the underlying filesystem and ever-increasing drive space killed off this product niche.