I formatted my SD card to install the Raspbian Jessie, using Etcher, but it gave me several errors, and after that my Mac, or Windows, laptop is not detecting the card at all.
When you install Raspbian on an SD CARD, it creates two partitions :
A FAT16 partition and an EXT4 partition
Normally you should be able to see the FAT16 partition so I guess the card is a bit damaged
You can use a third party software to format your SD card like AOMEI Partition Assistant Download here on Windows or GPARTED on a Linux Distrubution
Seems like its a windows,
and you should format the card before you go. here is the hard one (hard formatting)
so; start menu > run > diskpart > list disk
console show you disks available on your pc generally disk 0 is local disks (C:,D: etc) and disk 1 points to others like usb flash disk sd card vs
continue with comands
select disk 1 > list disk > clean > create partition primary > assign letter g:
I recommend to you to list disk again before clean command to check disk 1 is selected (you can see the exact sizes on list so you can understand which one is your sd card and which should be selected) so you have done with the cleaning stuff and assigned the card as g: as a virtual drive you can chose any letters that does not stands for any other virtual drive
ntfs can be eighter fat32 etc.
to summerize completely you need this commands in order;
start menu > run > diskpart > list disk > select disk 1 > list disk > clean > create partition primary > assign letter g: > format fs=ntfs
it takes nearly 20 mins to ntfs format 16gb micro-sd card for my raspberry pi 3
This might seem a little nieve, but I just inserted my unusable SD card into my digital camera, and it seemed to reformat it to a condition where I could proceed with another partitioning. You also might want to use the minipartion disk tool on windows or the SD card formatter (https://www.sdcard.org/downloads/formatter_4/index.html) to just put one big FAt32 partiton on the card before other Linux partitioning. Good luck.
Boot any Linux Live distro that has GParted.
Delete SD partition-table. For Pete's sake be 100% sure you are working on the SD-card and not your HDD or SSD
Use dd to overwrite the first 25 MBs of your card (not card partitions) with data from:
And be 100% sure your dd is done to, and from, the right devices. If not, you could kill your Windows OS, or even harm your computer.