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First of all, an SD card is needed and the amount of content is not limited. 
1. Try not to hot-swap after inserting the SD card, otherwise it may cause data not to be synchronized, the TV restarts or simply cannot enter the TV desktop;
2. Do not eject the SD card in the HD player. Otherwise, the software will not be installed on the SD card.
3, some of the software's data package may not be placed on an external SD card, this is not the reason for the millet, is the reason for the software;
4. Do not turn off the default option at will, otherwise the big APK you download will still be installed on the memory card, even if you insert the SD card, it will not prompt you to install the location
5, if you want to change the SD card, the SD card will pop up, the SD card directory completely copied to the new SD card, and then insert the new SD card into the TV on the line.
Millet TV 2nd generation configuration 2GB DDR3 large memory and 8G flash memory, under normal circumstances has enough users to install a lot of software. Of course, if you are an enthusiast, it is probably not enough. However, millet TV 2nd generation is supportive and can expand to 64G. No matter how big your software is installed, it can be installed. Below I simply teach you how to install software to an external SD card without ROOT. The first step: Install the SD card into the card slot. Push it on the line. Pay attention to the direction. The pattern faces outward. The second step: Turn on the TV and enter the settings - External settings Step 4: Enter Outer Settings--Storage--(The application is installed on the SD card by default) Step 5: The normal default is closed. The question is: The TV has its own memory and an SD card. How do you determine if it is actually installed on SD? Teach you a trick, want to see the assistant to download the ES file manager. With the ES file manager you can see that there is no SD card inserted and only 1 is displayed Inserting an SD card shows that the TV has two cards, one is the TV's memory card, and the other is a card. This is the application that the external SD card has just installed. Summary: In fact, millet TV 2 generation can not completely install SD card without ROOT. However, there are several considerations that need attention: