How do I back up my ND-3540a firmware?

I want to know how I can copy the original firmware on my stock drive just in case there’s a screw up while modding my firmware. Thanks.

You can download Binflash and dump your firmware.

Chances are that your existing firmware is already available at NEC-3540A Firmware for download.

Search button works really well for finding stuff.

Didn’t know what the program was called so I couldn’t search for it, and I did search for awhile before I posted on here.

Thanks Nemesys

Yeah, i did a search for flashing firmware and found, by then nem had already posted it. Hope you get it bro.