Switch#copy tftp: flash:
Address of remote host []? 10.90.90.1
Source filename []? DGS-3620/DGS3620_Run_2_69_B001.had
Destination filename []? DGS3620_Run_2_69_B001.had
Accessing tftp://10.90.90.1/DGS-3620/DGS3620_Run_2_69_B001.had...
Transmission start...
Transmission finished, file length 8257892 bytes.
Please wait, programming flash.............. Done.
Switch#dir
Directory of /c:
1 -rw 8257892 Nov 16 2018 17:16:38 DGS3620_Run_2_69_B001.had
2 -rw 37011 Nov 16 2018 16:19:09 config.cfg
3 -rw 6111876 Nov 16 2018 16:44:21 runtime.had
4 -rw 6114092 Nov 16 2018 17:11:14 DGS3620_Run_1_58_R004.had
5 d-- 0 Nov 16 2018 17:13:24 system
Switch#copy running-config startup-config
Destination filename startup-config? [y/n]: y
Saving all configurations to NV-RAM.......... Done.
Switch(config)#boot image DGS3620_Run_2_69_B001.had
Switch#show boot
Unit 1
Boot image: /c:/DGS3620_Run_2_69_B001.had
Boot config: /c:/config.cfg