Why can't some Android phones store files larger than 2GB | Iooko - 上海419贵族宝贝-上海后花园1314-上海品茶网-阿拉爱上海

With the popularity of smart phones, the configuration of mobile phones has also been developed at a high speed. In this development process, the most obvious thing is that the mobile phone screen is becoming larger and larger, with higher resolution, from Nokia's QVGA to the current 1080P , indicators are comparable to desktop computers We all know that today's smart phones will be equipped with 720P screens as long as they are more high-end, and even better smart phones will be equipped with 720P screens 1080P The screen is so good that it would be wasteful not to watch movies in HD. Friends who love movies even collect many HD movies themselves, but many people do not know that most Android phones do not support storing files larger than 2GB, So if you need to play high-definition movies, once the phone exceeds this capacity, there is no way to store them.

So what's the problem? Why can't I copy a 5GB HD movie on the LT28i with 16GB of memory? In fact, the reason is very simple. The reason why our computer can store files larger than 4GB is that the hard disk file system just supports it. So what is the file system? File system is the method and data structure used by the operating system to define files on disk or partition; That is, the method of organizing files on disk. It also refers to the disk or partition used to store files, or the type of file system. The software organization responsible for managing and storing file information in the operating system is called the file management system, or file system for short. The file system consists of three parts: software related to file management, managed files, and data structures required for implementing file management. From a system perspective, the file system is a system that organizes and allocates file storage space, is responsible for file storage, and protects and retrieves stored files. Specifically, it is responsible for creating files for users, storing, reading, modifying, and dumping files, controlling file access, and canceling files when users no longer use them.

The common file systems of our Windows computers are NTFS, FAT32, exFAT, while the common file systems of Linux based Android systems are Ext2, Ext3, Ext4, and so on. The maximum single file size of FAT32 cannot exceed 4GB, Ext2 cannot exceed 2GB, and some Android phones have their own storage file system, Ext2, which is why large files exceeding 2GB cannot be stored.

Since Android 2.3, Google has realized some shortcomings of Ext2 and started to add Ext3 and Ext4 file system format support. Ext3 supports up to 2TB files and Ext4 supports up to 16TB files. So as long as the mobile phone manufacturer intends to improve this problem, the mobile phone can still support files larger than 2GB or even 4GB. In the future, the configuration of Android phones will become stronger and stronger, and its multimedia function will also receive further attention. However, whether this function can be played well depends on many factors, such as the reading and writing speed of the memory, the decoding ability of the processor, video output, etc. If one day you watch a high-definition movie on the phone, it will download quickly, transmit quickly If the memory space is enough, I believe everyone will be happy to use this function.