Switch to "edit mode" to begin editing.
Change sectors in the Editor Window,
then
"Write changes" to disk or
"Discard" changes.
If you edit sectors (not a file) you may change several
neighbour sectors before write.
Edit mode is supported when view data as:
hex,
text,
FAT directory,
FAT16/FAT32,
partitions table,
FAT/FAT32/NTFS boot sector.
To write to many sectors use menu commands:
Switch off Bios antivirus protection and some other antivirus programs when write to the first sector of HDD.