There are many ways to format sandisk memory card ultra, extreme or extreme pro or sandisk compactflash card, sandisk micro sd card, sdhc, sdxc: Windows right click media format option, disk management format, Windows diskpart cmd, free sandisk sd card formatters...
The easiest way to format sandisk sd card is to get it inserted with a card adaptor to a Windows computer, right click format it. (Pro: it allows to select format file system for sandisk sd card fat32/exfat, or even ntfs on the format options in Windows computers)
Or you may format sandisk sd card in your camera, Android phone/device.
Question: Is it able to format sandisk sd card fat32 in Android or camera?
-> The answer: if your sandisk memory card is over 32gb, it would be formatted to be exfat in your device by default, if you want to get it formatted to fat32, you need to get it formatted in Windows computer, like Windows 10.
If your sandisk sd card has write protection, it could be removed by diskpart cmd with the following steps.
Note: when an sd card is dying, it may turn on its write protection in the end, if the above cmd could not help to remove the sandisk sd card write protection, you may try the following solution.
When it is unable to format sandisk sd card, you may force format it with the following ways.
Key FIX - Delete sd card volume in Windows computer disk management, and create a new volume for sandisk sd card
If you want to format your sandisk memory card on MAC machine, the 'Erase' function in Disk Utility may work for you.
Format sandisk sd card fat32 in Disk Utility with format option MS-DOS(FAT)