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The author:(作者)aaapublished in(发表于) 2013/12/15 21:55:54 The truth about memory cards still use the FAT32 file system，
FAT32 file systems for removable storage card is still the truth-FAT32,NTFS-IT information The truth about memory cards still use the FAT32 file system
In 2001, Microsoft XP systems for their local disk uses the NTFS file system by default, but 12 years later, USB removable devices on the market and external reset SD card memory still use FAT32 file format, this is why hardware manufacturers choose to obsolete file system format?
It is clear that this is not a hardware manufacturers its own problems, but for users, after using the NTFS format, you'll find that the FAT32 file system format, causing much inconvenience.
Shortcomings of the FAT32 file system:
· The FAT32 file system does not support the 4G and single-file storage, maximum storage space for the 2TB of the FAT32 file system. For example, HD movies, and almost impossible to FAT32 formatted disk copy or write.
· FAT32 is not a journaling file system, it also means that the file system is more prone to problems. But added to NTFS file system checks, reduces disk data risk issues.
· Permissions FAT32 does not support files feature. With the NTFS file system, disk storage file security permissions can be further enhanced.
Therefore, the Windows system tray, the best way is to use the NTFS file system format for management, NTFS format is also more secure, reliable, and support for larger file size and driver devices.
But for removable storage devices, but different.
The following is the detailed reasons:
1, USB drive/SD card capacity is less than 2TB, so don't worry about disk capacity limit question. Occasionally with the copying and moving volume in the 4G file.
2, whether USB or SD card, do not need to use a similar system diary-type disk management features, the main function is portable, portability, if u use the NTFS format, will also have a greater amount of reading and writing, reducing the life of USB Flash memory.
3, file permissions function, USB memory stick or SD card is unlikely to be used. Only when between different machines remove the removable device, will encounter similar problems.
For example, local disk in a machine, as local drivers and management, and assign it a unique special user ID number, you can always work, for a USB memory stick and SD card devices, however, due to the need to change between different machines, and each time it will generate different ID identification number and, therefore, file permission security is not an issue.
Therefore, unless the 4G files are required when writing USB/SD card needs to be formatted with the NTFS file system used in the rest of the environment, the FAT32 file system may be sufficient for use.
Conclusion on all desktop systems to both FAT32 and NTFS file system compatibility:
· Win platforms: both are compatible
· Mac platforms: Mac OS x support read NTFS file system and cannot be written for FAT32 can properly read and write
· Linux platform: the normal read/write NTFS file format, but not perfect, the general use of file system format for Linux Home
Therefore, for removable devices, often connected to a different desktop on your system, if you are using the FAT32 file system, can be a normal operation and to read and write, if you are using the NTFS file system cannot guarantee the normal work. For hardware vendors, therefore, you can only choose a versatility greater file system, FAT32 used in removable storage devices such as USB memory sticks or SD cards.
While Microsoft's exFAT file format is also available, but the more common low.
移动存储卡仍然用FAT32文件系统的真相 - FAT32,NTFS - IT资讯移动存储卡仍然用FAT32文件系统的真相
微软在2001年就为自家的XP系统的本地磁盘默认使用了NTFS文件系统，但是12年之后，市面上的USB可移动设备和SD卡等外置存储器仍然在用着FAT32文件格式，这是什么理由让硬件厂商选择过时的文件系统格式？
很显然，这不是硬件厂商自身的问题，但是对于用户而言，用过NTFS格式后，会发现FAT32文件系统格式带来诸多不便。
FAT32文件系统的不足之处：
• FAT32文件系统不支持4G及以上单文件的存储，FAT32文件系统最大支持的储存空间为2TB。例如高清电影，几乎无法往FAT32格式的磁盘里面拷贝或者写入。
• FAT32不是一个日记型的文件系统，也意味着该文件系统更容易发生问题。但是NTFS就添加了对文件系统的检查功能，降低了磁盘的数据风险问题。
• FAT32不支持文件的权限功能。借助NTFS文件系统，可以进一步增强磁盘存储文件的安全权限能力。
因此，对于Windows的系统盘，最佳的方式是使用NTFS格式的文件系统进行管理，NTFS格式也更安全、可靠以及支持更大的文件体积和驱动设备。
但是对于可移动存储设备的情况，却不同了。
以下是详细原因：
1、U盘/SD卡的容量都低于2TB，因此不用担心磁盘容量有上限的问题。偶尔会用拷贝移动体积在4G左右的文件。
2、无论U盘还是SD卡，不需要使用类似系统盘的日记型磁盘管理功能，最主要的功能在于便携，可移动性，如果U盘使用NTFS格式，也会带来更大的读写量，降低U盘闪存的寿命。
3、对于文件权限功能，U盘或者SD卡也不大会用上。只有当在不同的机器设备之间移除可移动设备时，才会遇到类似的问题。
例如在A机器本地磁盘，由于本地驱动和管理，并分配了唯一的特殊的用户ID号码，就可以一直正常工作，但是对于U盘和SD卡设备而言，由于需要在不同的机器设备之间变更，因此每次都会生成不同的ID识别号码，因此也不存在文件权限安全的问题。
因此，除非是需要使用4G以上的单文件的写入时，才需要将U盘/SD卡格式化为NTFS文件系统，在其余的使用环境下，FAT32文件系统也足够使用了。
最后谈一下所有桌面系统对FAT32和NTFS两种文件系统的兼容性：
• Win平台：两者都兼容
• Mac平台：Mac OS X全面支持读取NTFS文件系统，无法写入；对于FAT32可以正常读写
• Linux平台：可以正常读写NTFS文件格式，但并不完美，一般使用Linux自家的文件系统格式
因此，对于可移动设备，经常会连接到不同的桌面系统上，如果使用FAT32文件系统，都可以正常操作和读写，如果使用可NTFS文件系统，不能保证正常工作。因此对于硬件厂商而言，只能选择一种通用性更强的文件系统，即FAT32，用于U盘或者SD卡等可移动存储设备中。
同时微软也提供了一种exFAT的文件格式，但通用性更低。
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