The main components of a computer are the computing unit, the storage device, the input device and the output device, and nowadays computers have an additional network device.
This time we will mainly talk about the file system in the storage device.
The so-called storage device is a device that can store information,combine pdfs for free windows such as memory, hard disk, USB flash drive, SD card, TF card and so on. As long as it can store data, we can call it a storage device. Different storage devices have different storage methods, and even different applications can define different storage methods. One of the ways we often use is file storage.
When we edit a text document (Word document), create a table, or record a song, how are these things represented in a computer. The answer is digitization.
What digitization is, is taking different forms of content, turning them into numbers, and ultimately using a binary identity in the computer. How is it done? For example, if you want to represent abcdefg and so on,convert scanned pdf to word online free large files these letters don't seem to have anything to do with numbers, but we can number them, 97 for a, 98 for B, 99 for C, and then all the letters become numbers. Any number can be easily converted to binary. It can be stored in a computer. You say letters aren't enough, we have so many words, it's easy, keep counting, "good" on one, "you" on two, so the computer can store them. What else? Colors, fonts, everything, has found a way to be numbered, it's called a number. Many software programs use some common information, and there is a standardization organization that numbers them, so you just use them with the standard. For example, in a, b, and c, you can find ASCII (ASCII). Common text characters have the UTF-8 standard, and colors are usually numbered in RGB. A Word document contains a variety of information, text, sizes, fonts, paragraphs, tables, etc. Some of these elements use standard numbering, and some are numbered by Microsoft itself. In any case, the information you want to use can be converted to numbers, to a series of 0101 binary digits stored in the computer.
But this content can't just be stored and placed around. Suddenly a bunch of 0101 numbers appear. Can you tell what these are? Do you know what software we need to find to recognize the numbers inside?
The solution to this problem is file storage with a file system.
Maybe you've heard names like FAT, NTFS, ext4.pdf editor online these are types of file systems. Different systems and from different times will use different file systems for different tasks. The file systems that you can hear the names of are powerful, recommended by the system or very useful in a certain area.
What does a file system mean to the average user? Very simply, the ability to store content and to find that information easily and to share it with others easily. The two main things we know for these needs are file names and file locations.
File name, is to give a name to the document, write a document today, write a document tomorrow, do not use their own name to distinguish between, you know which is which? Name is very important. There is such a problem in fact and the design of the document management system has nothing to do, that is, the extension, the extension is used to give different data types of documents to do a logo. For example, we have a Word document, this information is complete inside the file name with ". ", split the main file name and extension, the main file name is used to study the contents of the relevant documents, and docx is used as a logo technology this is because of a Word generated files, please use Word software products to open. Extension is not necessary, but generally need to add, such as picture files plus .jpg, compressed packages .zip, convenient for us to identify different types of files.
File location, if your computer has more than one hard disk, your files on which hard disk? You insert a USB flash drive, how do you access this USB flash drive? This issue is actually not much to do with the file system, the file system is more concerned about how the file is distributed on the storage device. What does it have to do with? It has to do with the operating system you are using. For example, if you use Windows, Windows uses C:, D:, etc. to identify different disks, or actually different partitions (a disk can be divided into different partitions and have different file systems). If you go to Linux, or macOS, then these partitions are reproduced in a tree system, so they can be identified in the form of /mnt/disk1, /VolumeA/diskA, etc. Of course, these are the ways defined by the operating system itself, and in any case, a way of identifying the corresponding disk partitions will be found.
If you put all the files under this partition identifier, there will be a problem, there are too many files, it is troublesome to find them, to categorize them, you can only rely on the filename, and you can only distinguish them by putting the short information used for categorization inside the filename. This is like a house, all things are piled up inside, a word, chaos. How do we solve it? Buy different cupboards, buy different cabinets, categorize items and put them in them, different cupboards have different partitions, cabinets are divided into different drawers. Our file system also introduces folders, which can be nested one layer at a time, so that we can categorize and put different files in them. That's all well and good, but where do we put my files when we talk to someone? Different operating systems use different ways of identifying files. If you use "/" to separate different directories on Linux or macOS, it's easy to represent the files you want to represent.
