IOS , is there a fairly universal one that can be used

[unique1]

I have been requested to swap out devices at various locations and there is some distance between sites, i would like to have a universal IOS on a USB drive  to use to transfer files etc or even upgrade devices.

[balaji.bandi]

yes possible it all depends on the device, make sure you need to consider backup plan.

If the device running more than years, make sure you reload before upgrade.

also be prepared some one standby in case any issue with console cable access for you.