When you want to Format a USB or hard drive, there are two common options: Quick Format and Full Format. So When is Quick Format ,Full Format the drive? Let’s find out below this article of tip.com.vn.

I. Storage formats.

The drives are formatted in both low and high formats.

  • Low level format (Low-Level Format) : A low-level format fixed by the manufacturer, with a single sector capacity of 512 bytes or 4096 bytes. The average user cannot format the drive at a low level.
  • High level format (High-level formatting) is the process by which the operating system writes a file system structure to disk. There are many file structures, popular on Windows with FAT (File Allocation Table), FAT32 or NTFS, and on Mac OS there is HFS+. When conducting High level format The system will first write a boot sector to the first sector of the drive, then the next sectors will be written in FAT format. In addition, high-level formatting may include scanning the drive for bad sectors, or writing 0 to all sectors in the drive.

1. Quick Format.

When you select Quick Format, HDH will delete information about the file structure in sectors that already have data, making it possible for the system to overwrite those sectors later. This means that the data in these cells has not actually been deleted. That means when you choose quick format, the data you thought was deleted can still be restored normally.

2. Full format.

When choosing Full Format is the correct operation to delete data. HDH will actually erase all data on sectors. Accessing all the sectors on a drive takes a lot of time, so full format usually takes much longer than quick format.

II. When to choose Full Format?

  • Quick Format is only effective when you want to format quickly, but you need to consider if your device has sensitive or important information that is easy to be taken advantage of by bad guys.
  • With Full Format, every sector will be accessed, and if there is a bad sector, the system will recognize it, so this is also a way to test the hard drive for errors or not.
  • Full Format is recommended to ensure data is wiped clean and safe.


To choose When is Quick Format ,Full Format the drive You need to know whether the data on your drive or USB is afraid of being exposed. If it’s not too important, choose Quick Format to save time, otherwise, choose Full Format to be safe. Good luck.