Open the developer options on redmi:
Settings -> My Device -> All Parameters -> MIUI Version Click 5 times in a row
In the All Parameters interface, we find the MIUI version, and then click this 5 times, when you click, there will be a prompt at the bottom of the screen, and there are several more times to enter developer mode.
After the system prompts you to be in developer mode, we need to return to the settings interface and select more settings in the settings interface.
After entering the more settings interface, we see that there is a developer option.
Settings -> More Settings -> Developer Options -> USB Debugging
Settings -> More Settings -> Developer Options -> USB Installation
Tool to install APK on PC
https://sourceforge.net/projects/apkinstaller/
Android Package Installer
This is a Android package installer app which is platform independent and it enables you to install android apps directly from your computer. All you have to do is to copy the apk file in working folder and type in the filename as it is followed by .apk extension..
Hope u’ll enjoy using this software..
Features
Works on Windows Linux and Mac
Released /Apk Installer/ApkInstaller v3.0_By SAI PRASAD.zip