` markers\n3. Checks if they contain `dl-card` (new format) \n4. Extracts the full HTML document\n\nBut this is very slow on a 30GB device. Let me try a smarter approach:\n- Use `debugfs` to find all free blocks\n- Only scan those blocks\n\nActually, let me try yet another approach. Let me use `debugfs` to iterate through inodes and find deleted ones that still have data. The `ls -d` command shows current directory entries, but `ncheck` can find all path names for given inodes.\n\nActually, the best approach for ext4 recovery is to use `extundelete` or `ext4magic`. Let me check if either is available, or install one.\n\nWait, I can also try `debugfs` with the `dump` command to extract data from specific inodes, or use `icheck` to find blocks belonging to specific inodes.\n\nBut I don't know which inodes the deleted files used. Let me try to find them.\n\nActually, let me try a completely different approach: use the raw device scan, but make it efficient by using `grep` with the `-P` (Perl regex) option to find the pattern `