user68783: Arduino: 1.8.13 (Windows Store 1.8.42.0) (Windows 10), Board: "Arduino Nano, ATmega328P"
Sketch uses 934 bytes (3%) of program storage space. Maximum is 30720 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 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=0x49
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x49
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x49
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x49
An error occurred while uploading the sketch
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x49
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x49
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x49
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x49
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x49
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x49
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

user69494: For me selecting the ATmega328P (Old Bootloader) from the Tools --> Processor menu in the Arduino IDE solved the problem.
See: https://gyorgybalassy.wordpress.com/2020/10/16/arduino-programmer-is-not-responding-not-in-sync-error/

68783: <p>Arduino: 1.8.13 (Windows Store 1.8.42.0) (Windows 10), Board: &quot;Arduino Nano, ATmega328P&quot;</p>
<p>Sketch uses 934 bytes (3%) of program storage space. Maximum is 30720 bytes.</p>
<p>Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.</p>
<p>avrdude: stk500_recv(): programmer is not responding</p>
<p>avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x49</p>
<p>avrdude: stk500_recv(): programmer is not responding</p>
<p>avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x49</p>
<p>avrdude: stk500_recv(): programmer is not responding</p>
<p>avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x49</p>
<p>avrdude: stk500_recv(): programmer is not responding</p>
<p>avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x49</p>
<p>An error occurred while uploading the sketch</p>
<p>avrdude: stk500_recv(): programmer is not responding</p>
<p>avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x49</p>
<p>avrdude: stk500_recv(): programmer is not responding</p>
<p>avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x49</p>
<p>avrdude: stk500_recv(): programmer is not responding</p>
<p>avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x49</p>
<p>avrdude: stk500_recv(): programmer is not responding</p>
<p>avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x49</p>
<p>avrdude: stk500_recv(): programmer is not responding</p>
<p>avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x49</p>
<p>avrdude: stk500_recv(): programmer is not responding</p>
<p>avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x49</p>
<p>This report would have more information with
&quot;Show verbose output during compilation&quot;
option enabled in File -&gt; Preferences.</p>
 69494: <p>For me selecting the <code>ATmega328P (Old Bootloader)</code> from the <strong>Tools</strong> --&gt; <strong>Processor</strong> menu in the Arduino IDE solved the problem.</p>
<p>See: <a href="https://gyorgybalassy.wordpress.com/2020/10/16/arduino-programmer-is-not-responding-not-in-sync-error/" rel="nofollow noreferrer">https://gyorgybalassy.wordpress.com/2020/10/16/arduino-programmer-is-not-responding-not-in-sync-error/</a></p>
