Before using assemble_sh704i_d904i.py, you must separate the NAND and OOB (out of bounds) data.
  - Download the [[https://github.com/kagekiyo7/k/blob/main/separate_nand_oob.py|separate_nand_oob.py]] script from Github and place it into the folder generated by ktdumper
  - Execute the following script <code>python separate_nand_oob.py nand_mixed.bin</code>
  - When given a set of options, select 0 (the other options are not needed for D904i/SH904i devices)<code>0: Data = 512 Bytes, OOB = 16 bytes, divisible = True</code>

To remove the FTL:
  - Download the [[https://github.com/irdkwia/various-keitai-assemble|assemble_sh704i_d904i.py]] script from Github
  - Execute the following command <code>python assemble_sh704i_d904i.py nand_mixed_separated_512.bin output.bin</code>
After this, you must use TestDisk to acquire the data.