Error Message when uploading

Hello,

I 've had this type of error message quite a few time recently.

I try to upload my soft to an Arduino uno

Sketch uses 5214 bytes (16%) of program storage space. Maximum is 32256 bytes.
Global variables use 103 bytes (5%) of dynamic memory, leaving 1945 bytes for local variables. Maximum is 2048 bytes.
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x00

....

Anyone knows what I could do?

thanks

(deleted)

Hi thx for replying

I think it is mainly for arduino Nano that we have to select old bootloader; I am using Uno here.

The strange think is that I just tried to upload my code in a friend s' Uno and it worked fine.

Is it possible that I "broke" mine?

This one in particular ( that failed to be uploaded) is brain new and has only been connected to the inputs of a motor dc driver