Amazon.com: Customer reviews: 64GB microSD Memory Card | Micro SD Class 10 Compatible with Amazon Kindle Fire 7, Kids Edition, Fire HD 8 / HD8, Fire HD 10 / HDX 7, HDX 8.9. Fits All 7 or 8.9 inches Tablet PC | 64 GB
I purchased a Kindle Fire HD10 with only 32Gb of storage and so required an extension. I decided to purchase this card as it was rated compatible with my device. I have read on the net that SD card compatibility must be carefully considered for any device, so didn't want to hazard getting the wrong card. I was not disappointed! I inserted the card and it was recognised immediately. My Kindle defaulted to storing downloaded books on it, which is what i wanted - more importantly there is no difference in the speed of access compared to before, when the files were on the device's inbuilt storage. Very happy with my purchase.