Tu-Ka

I get this error, can you please tell me how to deal with it? c:\platform-tools>fastboot format:ext4 userdata Warning: userdata type is f2fs, but ext4 was requested for formatting. mke2fs 1.46.6-rc1 (12-Sep-2022) mke2fs: Illegal or malformed device name while trying to determine filesystem size c:\platform-tools/mke2fs failed: 1 fastboot: error: Cannot generate image for userdata