How to enable USB Storage for Amazon Kindle Fire HD 7" Tablet I have these Amazon Kindle Fire HD 7" Tablet, ever since I bought it and the first time it prompted me if I wanna enable USB mass storage when I connected it to the computer, and I selected charge only or something close to that, up to this very moment, I can't access the tablet from a computer via USB cable

Specifications;

Android version: Android-5.1.1
Device Model: KFFOWI


Any solution please?
There are USB options which control how the port is to be used (or not) when connected to a computer.  Unfortunately, these options are pretty well hidden -- the easiest way to get to them is if you get a notification about the USB, and can click on it to open the USB options.
Otherwise, to get to the options:

From the top, pull down the toolbar and select the options (gear icon).
In the Device section, you have Device Options, open that.
There is a hidden &quot;Developer Options&quot; here (OS 5.6.8, but may be up a level under &quot;Device Options&quot; -- unhide by tapping the &quot;Serial Number&quot; name seven (7) times (you might get a countdown).  Then the Developer Options should be unhidden, either right below the Serial Number, or up a level under Device Options.
Open the &quot;Developer Options and tap on &quot;USB Connections&quot; selection.
You get choices on how the USB connection is used, select File transfer, or MTP (Media Transfer Protocol), or PTP (picture transfer Protocol),...