We all know that the MircoSD card we used for Sky3ds Plus is FAT32 format, so the largest storage file is 4GB. Sometimes you may meet the rom exceed 4GB when you play, but you don't know how to do. Here i want to introduce a way to trim it so that you can play with Sky3ds+.
Step 1. Download a .rar named 3dsexplorer_v1.5.3_mod (ROM Tool 3.1_3DSGuy), then unzip the files as normal. Open the file "3DSExplorer.exe"
Step 2. Click "File =》 OPEN" and choose the .3ds file which you need to compressed.
Step 3. Click "CCI => Trim CCI", now you will find the rom is much smaller than original.
Step 4. Now you can enjoy the game
Note: You can view this video for the detailed operation steps