If you are working with small organization that have limited budgets. Getting enterprise tools can be somewhat of a challenge, so if that’s the case. If you managing some network infrastructure, then you will need to update the ios. My favorite choice is pscp , for one its free and readily available. Below is the cli commands to get that ios moving.
Note: Ensure you have pscp installed.
Pscp.exe -scp cat3k.my.cisco.ios.bin email@example.com:cat3k.my.cisco.ios.bin
pscp.exe is the application we are using to getting the ios moving
-scp referrs the the secure copy protocol used to transfer the file
xxx.xxx.xxx.xx this is your ip address of the device you wish to sent to
: the colon represent to root direction in which the file will be sent (On most cisco devices the will be the flash: )