Use the "Wipe > Advanced Wipe > Repair or Change File System" menu to re-format the partition to Ext4.
This usually happens if a file was corrupted during download or if the flashed kernel is incompatible with your current Android version. n7000 twrp
Flashing a recovery image alone via Odin often results in the phone reverting to stock recovery. Use the "Wipe > Advanced Wipe > Repair
When successfully loaded via a custom kernel, TWRP transforms the N7000 into a highly flexible tool: n7000 twrp