Can't access internal storage from a computer after installing Marshmallow on Android device?

Recently I have update my OnePlus One phone to latest version of Android 6.0 (Marshmallow)

After I have updated to latest version I can’t access internal storage how I used to access before. Due to security options in 6.0 there are few options that were changed to enable access.

Here's how I could able to fix it.

1. Open Settings
2. Enable Developer options:
   1. Go to About phone (or tablet)
   2. Scroll to the bottom
   3. Tap Build number repeatedly. After several taps you will see it count down and then say "You are now a developer!"
3. Back to Settings
4. Tap Developer options, near the bottom
5. Scroll down to and tap Select USB Configuration
6. Change it to Charging only
7. Tap Select USB Configuration again
8. Change it back to MTP (Media Transfer Protocol)

That's it. You should now be able to open up the internal storage on the device from your computer.

Hope this helps!!