The folowing cards can be used with the camera regardless of capacity.
Solution
If the card is new or was previously formatted by another camera or computer, it is recommended that you format the card with the EOS Rebel T100 first.
SD memory cards
SDHC memory cards
SDXC memory cards
The camera can use UHS-I cards, but since it is not compatible with the UHS-I standard, writing/reading speeds will be equivalent to SD Speed Class 10 at most.
Cards that Can Record Movies
When shooting movies, use a large-capacity SD card rated SD Speed Class 6 "" or higher.
If you use a slow-writing card when shooting movies, the movie may not be recorded properly. Also, if you play back a movie on a card with a slow reading speed, the movie may not play back properly.
To check th ecard's writing/reading speed, refer to the card manufacturer's Web site.