All IT professionals should learn about programs like "HDD LLF Low Level Format Tool". This fantastic tool allows us to fromattare low-level a SD card. Unfortunately, this tool is not perfect and sometimes we may meet serious difficulties. For example, when we have mistakenly loaded a disk image before formatting the drive properly. Or even when the card is damaged. In these cases, our drive will be displayed as a raw file system and with the low-level formatting, you will see a amount of available memory wrong. Even if you try to low-level format, you probably will return a message that informs you that the number of sectors is wrong.
When this happens, in addition to the software mentioned, we have two other software. The first is called Erase US and can be downloaded in the trial version from here https://www.easeus.com/ and the second one is called Tuxera SD Card Formatter which can be downloaded here.
Once you have downloaded Erase Us, you should completely delete the partition. If you do not know how to do it, I advise you to read an article on how to delete a partition according to your operating system.
After you have applied all the changes, the program will tell you that the status of the drive is changed and by clicking "Yes" will appear the new information.
We're going to get the program to Erase Us and we will enter on Tuxera SD Card Formatter. Here we will select "overwrite format" and then click on "format".
That's not all. We have to go on our explorer and format the card in the format to fat32. We will choose the appropriate measure for the allocation of clusters. For this purpose, we can view a list that helps us provided by microsoft.
If after these steps your card still has problems, it is time to buy a new one.
This guide assumes that you are familiar with the PC and windows programs in general. If you have any problem to follow these steps leave a comment and I'll answer as soon as possible. Attention this guide is risky, the programs mentioned above destroy the data and may seriously affect the operation of the unit. I take no responsibility in any way and for any reason. If you decide to use this guide you do so at your own risk.