Gateway 3DS microSD Tool is a program written to fix GW3DS fragmentation errors, which can occur when:

• The rom file has more than 32 fragments.
• The rom file occupies either of the last two clusters on an exFAT partition.
• The root directory entry is fragmented, that lead to missing game icons.

It defragments only if it is necessary. For instance, if a rom file consists of 35 fragments, this will reduce the number of fragments to 32 by combining the 4 smallest fragments into a single fragment. It is faster and introduces less wear than reformatting and copying everything back.

Available commands:

• gw3ds.exe scan x: - Scan for problems (x: is the driveletter of your GW3DS microSD card).
• gw3ds.exe fix x: - Fix fragmentation errors and missing game icons.