I think SSD's technology will improve and within the next 5 years we will see 100TB drives.
http://www.extremetech.com/computing/212203-samsung-unveils-massive-16tb-ssd-built-with-new-3d-nand
http://www.extremetech.com/computing/212203-samsung-unveils-massive-16tb-ssd-built-with-new-3d-nand