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You wont actually be able to plug an Android phone into an Android Tablet and have them communicate with each other. USB drivers are for Android to Windows, or Android to Mac, etc., but not Android to Android.
However, I have a solution for you.
There is a free app/service called Dropbox. Once you use it, you will wonder how you did without it before!
Normally I give these instructions to people so they can wirelessly send files to and from their PC and Android, but the process is still relevant for your issue.
With Dropbox, you get an app on your Android device, and an app on yoru PC. Any file you put in the Dropbox app on your Android, instantly becomes available on your PC. However, if you have the Dropbox app on two Android devices, then the same applies. Any file you put in the Dropbox app on one Android, you will see in the other.
You can share an entire folder of images, and when they upload you will have instant access to them on any device that has the Dropbox app on it, as well as them being on your PC, essentially backing up your pictures!
Here are the instructions. Follow them, and when you are done, install the free app on your tablet as well.
This is by far the easiest way to wirelessly sync files to and from your pc!
A little hint. ANY file you have synced with your dropbox account is also available via dropbox.com , so you can access them from any browser on any computer, anywhere.
How to Share FOLDERS of images, without sharing them one by one to dropbox.
Also, on some models you don't need to do that, you can actually hold your finger on the folder in the gallery for a couple seconds and choose to share the entire folder from the menu that pops-up. Now all those images will upload to your computer. If you have any further questions or this solution does not resolve the issue, please feel free to let me know.Please press the Accept Button if I have helped you today so I am credited for my time Assisting you. Keep in mind that JustAnswer does NOT pay me salary and only by you pressing accept am I compensated! Please don't leave negative feedback, If something isn't working let me know and I will continue working with you to resolve it! Positive Feedback & Bonuses are not necessary but ALWAYS appreciated!! Visit HelpWithAndroid.com and bookmark the page so you can get me directly with any questions in the future.