Download Lenovo A7-50 A3500 USB Drivers Latest Version
Lenovo USB Drivers Is very important and required files that manage you connecting your Lenovo A7-50 A3500 to PC.
So when you installing those drivers on your PC you can connect your Lenovo A7-50 A3500 to transfer data (normal connecting), and also connect your Lenovo device to Flash and upgrade Stock ROM (Firmware).
Quick Lenovo USB Driver Installation Guide.
Step 1: Extract The Drivers File.
Step 2: Run Setup File.
Step 3: Click next and select your language.
Step 4: Wait one minute.
Step 5: Click Finish Button.
Step 6: Now connect your Lenovo Device.
See full tutorial : How to install Lenovo USB Drivers