You may have heard a lot of the terms legacy and uefi and wondered what is the difference between them and what is the importance of using these systems.


In the beginning, you have to know that legacy is the literal translation of it, or as it is currently said on this system, the old status is what is meant here by BIOS.


The difference here will be between the  BIOS  and  uefi

First we have to get to know the BIOS 

BIOS is an abbreviation for Basic Input/Output System  , which  is a dead memory, meaning it cannot be written to, and it is the first thing that works on the device and its role is to make sure that all other parts associated with the computer are working and then it checks the volumes to search for Master Boot Record The main one searches the hard disk sector and then the sector that follows it. If you find it, the computer works without problems 




What is the uefi system?
The system UEFI is the acronym for Unified Extensible Firmware Interface  Unified interface firmware extended 
It was built based on technology developed by Intel Corporation and is considered the advanced version of the BIOS, as it has a greater ability to process data and is more secure than the BIOS system.
Easier to use than BIOS, as you can handle it with the mouse 
One of the most prominent differences between the two systems is that UEFI can handle hard disks with a capacity of more than 2.2 TB with partitioning more than 4 disks, and this is what the BIOS cannot do, as the BIOS works with MBR partition quality, while UEFI supports up to 8 zettabytes. Split up to 128 disks as it uses GPT technology.
In addition, UEFI is faster in terms of booting the computer than the BIOS, especially when the hard drive is large because it searches the entire partition and not sectors such as the BIOS system


In case you want to know if your device is running   legacy or uefi system
Press the Windows key and the letter r on the keyboard to open RUN, then type  msinfo32 and press Enter
You will now enter the system information, search for BIOS Mode and note what name is in front of it, legacy or uefi




Note, your device may support uefi system, but it is currently running in legacy system, and you can enter the BIOS and search for boot and search for uefi 

 uefi 
The bottom line is
that the uefi system is definitely better than the legacy system, as it is considered a development and
the legacy system will certainly be extinct in the near future, and
also the uefi system has the ability to deal with large volumes of hard drives, and this is what everyone is turning to now from owning a larger storage memory