How do i get my tablet to read my micro sd card?

It sounds like the tablet is having trouble reading your 128 GB SD cards.
There are a few things you can try to troubleshoot this issue:

1. Check the SD card for any visible damage. If the card is physically damaged, it may not work correctly.
2. Make sure that the SD card is properly inserted into the SD card slot on the tablet. It should fit snugly and be fully inserted.
3. Check that the SD card is compatible with your tablet. Some tablets can only support SD cards up to a certain capacity or with a certain type of file system.
4. If the SD card was working fine before and has suddenly stopped working, it's possible that the card has become corrupt. In this case, you may need to format the card to fix the issue.
5. If none of these steps help, you may need to try a different SD card to see if the issue is with the tablet or the SD card.

You can simply restart your Kindle fire device to fix this issue: A direct restart deals with the issue of the Kindle Fire Micro SD card not recognized. If the direct reset does not fix the issue, then you have to check your Micro SD card. There might be issues with your micro SD card.

Kindle Fire Micro SD Card Not recognized or Not Working

OR it needs formatting inside the Kindle. Videos here

https://www.google.com/search?q=Kindle+is+not+reading+memory+card

..

what model do you have

The Flexx10 has a micro SD slot, the SD card is about the size of your finger nail. If your Android phone also has a micro SD card you just remove it from the phone and plug it into the Flexx10. Then just transfer the pictures from the SD card to the tablets internal hard drive. When complete put the SD card back in the phone. If the SD card in your phone is the standard size it obviously won't fit the Flexx10. You then have the choice of either using Bluetooth to transfer the pictures between devices or buying a USB SD Card converter and plugging that in your FLexx10 with the Android SD card mounted in the converter.

The default on most tablets is to install apps to internal storage so the SD card does no good by itself. You can go into Settings>Applications and change the location for each app to the SD card. Likewise anything else you put on a tablet, particularly photos and videos get stored in internal storage. If you have taken a lot of photos and videos they can fill up your storage quickly. You can change this in the Camera app by tapping the settings icon and changing the storage option to SD card. You will still need to actually move existing photos and videos to the SD card manually or copy them to external storage and delete them. I would also change the image and video resolution in Camera settings to 640x480. This is plenty good enough for pictures you just want to look at on the device or share online.

Hi there, I think you will find these pages of help.
How to use SD Memory card on an Android Tablet PC Android Tablet PC...
How to Set the Default Download Location to an SD Card
Set Tablet Default App Installation Location to SD Card

I post on behalf of HP.

you needto put 1 in and then go to settings an "mount sd card",for it to recognize it

setings ,,storage ,. make default storage ..,. sd card n walla ,,

put micro sd card into usb with a usb micro sd holder a put music or photos onto it/put micro sd back into viewpad slot next to sim card slot /thats it.