Sorry for my bad english, I will try you to follow me. I bought the tablet one week ago and I knew it was bricked, but I did buy it even though. So, now I am trying to unbricked but I can't find the official stock firmware for this tab. I have read the tab could be unbricked by using the Sprint stock firmware, but I can't find its stock firmware either. I have tried to flash it with Heimdall with some files but it didn't work. Then I used Odin to make a partition with the PIT file but nothing, it's the same issue. I even can't find the official firmware for this model on sammobile.com/firmware. I don't know whether it is rooted or not already. What can I do? I bought this tab for nothing, thinking that I could fix it by myself, but... 
This is what appears when I tried to make a hard reset through the stock recovery:
E:Can't mount /dev/block/mmcblk0p1
(No such file or directory)
#MANUAL MODE#
E:Can't mount /dev/block/mmcblk0p1
(No such file or directory)
E:Can't mount CACHE :log/recovery.log
E:Can't open CACHE :log/recovery.log
E: Can't mount /dev/block/mmcblk0p1
(No such file or directory)
This is what appears when I tried to make a hard reset through the stock recovery:
E:Can't mount /dev/block/mmcblk0p1
(No such file or directory)
#MANUAL MODE#
E:Can't mount /dev/block/mmcblk0p1
(No such file or directory)
E:Can't mount CACHE :log/recovery.log
E:Can't open CACHE :log/recovery.log
E: Can't mount /dev/block/mmcblk0p1
(No such file or directory)