Fastboot FAILED (remote: failed to erase partition )

I have OPO 64GB and unlocked via fastboot. Every fastboot command related to flash or erase or format gave same error, unable to erase or write the partition.

I was able to fastboot boot <custom_recovery.img> into TWRP 2.7 I believe but TWRP gives errors, unable to mount <partition>, etc. Any command in TWRP results into a failure to mount or write.

I tried ADB Sideload <zip> and at 12% it rebooted back into Cyanogen Mod ready logo.

TWRP only runs if I boot to it via fastboot, it can't write to the bootloader via fastboot. One strange thing under TWRP storage it shows Internal Storage 0MB and USB-OTG 0MB, the partitions also show 0MB excep for system, but can't format anything or resize.

I feels like there is no storage in this device, is this something that can be fixed or is this a DOA device? It was working fine and a Cyanogen update ran and bricked it!

When I try to fastboot flash I get this error, fail to write. I even tried the OnePlusRestoreTool and it fails to write to the phone.

fastboot flash recovery twrp3.img
target reported max download size of 1073741824 bytes
sending 'recovery' (13326 KB)...
OKAY [ 0.422s]
writing 'recovery'...
FAILED (remote: flash write failure)
finished. total time: 5.479s


Thoughts?

Thank You

if I have root and erase it by wipe data/ factory reset the hard way what wi

I have root samsung tab 4 sm-t230nu and I want to get rid of it fully by wipe data and factory reset the hard way what will happen
I just don't need it anymore it's messing up my phone please tell me whatwill happen will it get rid of it fully or not