How can Android phones have built in external SD cards and can be switched without shutting down

No, when switching between internal and external, the address of the information extracted will be changed when the system is running, and you need to restart it to replace it.

SD card. Secure digital card is a new generation of memory devices based on semiconductor flash memory, which is widely used in portable devices such as digital cameras, personal digital assistants (PDAs) and multi-loggers. SD card (Secure Digital Memory Card) is a memory card based on semiconductor flash memory process, which was developed by Panasonic of Japan in 1999 and was developed by Toshiba and SanDisk of the United States.

In 2000, these companies initiated the establishment of the SD (Secure Digital Association) (SDA), which attracted a large number of manufacturers. These include IBM, Microsoft, Motorola, NEC, Samsung, and more. Driven by these leading manufacturers, SD cards have become the most widely used memory cards in consumer digital devices.

SD card has a large capacity, high performance, security and other characteristics of the multi-functional memory card, it has an additional data copyright protection password authentication function (SDMI standard) than MMC card, the read and write speed is 4 times faster than MMC card, up to 2M seconds.

Click on Settings, SD Card option.

Click on Offload SD card.

Unplug the SD card and insert the SD card that needs to be replaced.

Then click on the Install SD card in the tab just now.

There is an SD card option in the settings, there is an uninstall SD card inside, click Uninstall, unplug the SD card, insert the SD card that needs to be replaced, and then click to install the SD card in the SD card option.

System settings Storage to unmount the SD card. Then you don't have to switch off. If there is no button to uninstall the SD card, the phone can only be switched off.

After installing the 360 Mobile Assistant, open the computer version of the 360 Mobile Assistant, click "Phone" - Files" At this time, the "File Management" interface will appear, the memory card 1 in it is your phone memory, and the memory card 2 is your external SD card.

Because in the 360 mobile assistant interface, there is only copy in the phone's memory, so you can copy it to your external SD card.

Of course, you can also export movies from your phone's internal memory card to your desktop and then import them to your memory card2 (external SD card). It can be dragged straight through. That's clear enough.

Modify with the RE manager, not with MT

The landlord himself knows how to do it.,For the landlord.,That's a big deal.。。

In Settings - Advanced Settings - General Settings - Primary Storage Device Settings, select and restart

In the settings, there is a default memory that can be changed back.

Generally, it is selected in "Settings" - Storage - Default Memory.

Connect your phone to your computer and copy each other.

Or directly copy and cut in the internal SD card, and then paste in the external SD card.

It is normal for some programs to be mounted on an external SD card and may not run.

If you choose to install it on your phone, it will be installed in the memory of your phone.

As soon as the memory RAM of the mobile phone is powered off, the content will disappear, so it is running working memory, so your program cannot be installed into the memory RAM, it is actually still installed in the "built-in SD", and then sent from the "built-in SD" to the memory RAM to run during runtime.

Mainly because of the confusion caused by the non-standard arguments that are now available.

1. You can enter the storage of the settings, and then set the default storage to SD card or mobile phone memory.

2. If the memory of the mobile phone is insufficient, it is recommended to restore the factory settings, and you need to back up important data in advance.

3. You can also flash the machine, be careful not to flash the machine casually, which will lead to the instability of the system.

4. In a broad sense, mobile phone system memory is divided into "mobile phone running memory" and "mobile phone non-operating memory". The "running memory" of a mobile phone is equivalent to the memory (or memory module) of a computer; The "non-running memory" of the mobile phone, that is, the ROM and hard disk of the mobile phone, is the internal memory of the fuselage (referred to as the fuselage memory), which is equivalent to the hard disk of the computer.