Insert bytes into middle of a file (in windows filesystem) without reading entire file (using File Allocation Table)?

Question

I need a way to insert some file clusters into the middle of a file to insert some data.

Normally, I would just read the entire file and write it back out again with

Answer 1

Edited - another approach - how about switching to Mac for this task? They have superior editing capabilities, with automation capabilities!

Edited - the original specs suggested the file was being modified a lot, instead it is modified once. Suggest as others have pointed out to do the operation in the background: copy to new file, delete old file, rename new file to old file.

I would abandon this approach. A database is what you're looking for./YR