Does Kindle Have a Micro SD Slot?by Serm Murmson
A micro SD card is a small memory card that can be used to store and transfer files. The only Amazon Kindle that has a micro SD slot is the 1st Generation model. Because each e-book is so small, and because there are other storage options, the micro SD slot is not a critical Kindle feature.
Internal Storage Capacity
The current Kindle models do not support micro SD access. The memory storage on these devices is all internal. Thankfully, they all have at least 2GB of internal storage, which is enough for thousands of e-books. Though they vary in actual size, e-books do not take up much hard drive space because they are predominantly text characters. Images in an e-book increase the size of a file slightly, but unless an e-book is predominantly images, it likely won't be larger than 3MB to 4MB. In fact, many plain text e-books are under 1MB in size.
Other Storage Options
To expand the storage capabilities of your Kindle, you can use a number of different devices and approaches. You can create a folder on your computer's hard drive specifically for Kindle files and organize them how you want. Alternatively, you can use an external hard drive. However, you will still need to go through a computer or similar USB host device in order to transfer files from one place to another. Lastly, Amazon's cloud services back up all of the official Amazon content on your Kindle. Therefore, if you want to access a book that you own but do not currently store, you can download it from Amazon.