The reason why Apple phones don't support expansion:
1. With the rapid development of science and technology, the price of flash memory is getting cheaper and cheaper. However, Apple has always regarded the storage space of devices as a major standard for users to choose. You know, 16G version and 32G version of the iPhone differ a lot in licensed prices, and the difference is much higher than the value of the flash memory itself.
Secondly, Apple's strict requirements in industrial design also played an important role. Steve Jobs, the late Apple co-founder, highly praised the beauty of simplicity, and configuring redundant interfaces on hardware became one of the things he could not tolerate. That's why the iPhone has only one charging interface and one headphone jack, and that's why the MacBook cancels the external drive and Ethernet interface.
3. In addition to the external design, the closed embedded design of flash memory can also allow designers to better plan the internal structure of the fuselage. Today, the development of mobile device battery is in a bottleneck, and every hardware manufacturer hopes to bring more powerful standby time to users while ensuring performance, and this longer standby time means larger battery. Embedded enclosed hardware can save space to the greatest extent.
In addition, the poor performance of SD card itself is also an influencing factor. Compared with the built-in flash memory, the reading speed of SD card is often too slow, and it is easy to crash, which often increases unnecessary power consumption. Cancelling the setting of SD card can ensure the absolute control of files, solve many hidden dangers of files to a certain extent, and ensure the stability of system operation. Moreover, after using SD card, file management will be more complicated, and multiple memories will often appear.