http://www.m3adapter.com/SLOT-1/faq.htm
Q: How many files can I have on the M3DS Simply?
A: M3DS Simply supports 128MB~4GB SD/TF (MicroSD) card , 4GB=32Gbit.
Why they state 4GB is beyond me.
http://www.sdcard.org/sd_memorycard/Simpli...ecification.PDF
from page 5
3.3 Card Capacity
In terms of capacity, two types of SD Memory Cards are defined:
• Standard Capacity SD Memory Cards supports capacity up to and including 2 G bytes (231 bytes).
All versions of the Physical Specifications define the Standard Capacity SD Memory Card.
• High Capacity SD Memory Cards supports capacity more than 2 G bytes (231 bytes) and this version
of specification limits capacity up to and including 32 GB. High Capacity SD Memory Card is newly
defined from the Physical Layer Specification Version 2.00.
Only hosts that are compliant to the Physical Layer Specification version 2.00 or higher and the SD File
System Specification Ver2.00 can access High Capacity SD Memory Cards. Other hosts fail to initialize
High Capacity SD Memory Cards (See Figure 3-1).
Note:
1. The Part 1 Physical Layer Specification Version 2.00 and Part 2 File System Specification
Version 2.00 allow Standard Capacity SD Memory Cards to have capacity up to and
including 2 GB and High Capacity SD Memory Cards to have capacity up to and including
32 GB. SD Memory Cards with a capacity greater than 32 GB will be available with updated
versions of Part 1 and Part 2 Specifications.
2. Hosts that can access (read and/or write) SD Memory Cards with a capacity greater than 2
GB and up to and including 32 GB, shall also be able to access SD Memory Cards with a
capacity of 2 GB or less.