Default [Q] Internal storage problem after formatting

hi guys , i'm having a problem with my internal storage which its driven me crazy i got a AigoPad M60 its been good lately until i formate it then tried installing some apps , BOOM ! no free space BUT there are no apps noting at all is there just to let you know that i checked the space which my internal storage : shows noting not even the size BUT on the other hand my SD card is working fine plus i can see the size , all i'm saying is that i cant install apps i cant do any thing . this is my first post here cus i have noticed that this site is really useful also helped me alot with some stuff i didnt know before i JUST registered . i will really appreciate it if anyone helped ,
Thank You So Much .