Install the Samsung USB drivers on your PC so Windows recognizes the phone.
The Samsung Galaxy S2 was released in 2011 and officially supports only up to Android 4.1 (Jelly Bean). Running Android 13 on this 13-year-old device is an impressive technical feat made possible by the enthusiast developer community (specifically through XDA Developers). samsung galaxy s2 android 13 free
Visit the official XDA Developers Forum thread for "LineageOS 20 [I9100]" for the latest download links and developer support. Install the Samsung USB drivers on your PC