Hi, seems like a lot of brothers here opt for the 64GB. Will it be sufficient if it is intend to use for long term without the help of cloud storage or is it worth to add on another 650 to get the 256GB for long term usage cause the current ipad I'm using had last for 9 yrs & it currently cant swicth on anymore dont know for whatsoever reason. Hahaha. I expect the next purchase can last for at least 6 yrs?