Try using the archive download-sw command instead of copy tftp: flash:
For that you'll need the .tar version instead of the .bin
Reason for using archive downlaod-sw command being that it will automatically remove older versions (or rather, it has options for doing the removal) and it will include the html files as well, which might come in handy if your customer at some time want to use web-based management fo the switch.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...