My large SD card won't format on my 10 year old Canon DSLR

May 2, 2018
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I cannot format my 128 GB SD card to my 10 year old Canon Rebel XSI. I downloaded the SD formatting app- it took 14 hours on my mac, but my camera still won't take it.
 

USAFRet

Illustrious
Moderator


According to your user manual, what is the max size card that camera can use?