EOS Rebel T7 won't format 32GB microSDHC card in adapter

[soccerose]

Hello.  I have an EOS Rebel T7 which I haven't used in about 4 years.  I have resurrected the camera and inserted a new card (32 GB microSDHC plus adapter).  I made sure I inserted it correctly and the the write-protection switch is off.  When I try to format, I get a message "Cannot format - change card"

A previous identical card (same make, storage etc.) worked fine. 

Does anyone have any ideas? 

Thank you

[jrhoffman75]

The use of microSD cards in adapters is not recommended. As you have found, they can be very erratic.

[soccerose]

Is there a GB maximum for the cards?

thank you for your help!

[jrhoffman75 · Accepted solution]

The limit would be how much of your "eggs" you want in one "basket". 

Unless you are shooting movies I would go with 64GB max if you are shooting JPEG. Maybe 128GB if shooting RAW.

[Tintype_18]

Set the micro card and reader aside. Format the full size card. I have 32GB and 64GB cards but use the 32 exclusively. Hard to fill one to overflowing.