Well, the way to do it normally would be to go through the Disk Manager - right click on My Computer, click on Manage, in the left pane click on Disk Management, in the right pane click on the removable disk and select format. In that format dialog box you can select a different Default Size - it is reported in Bytes and 4096 Bytes is 4 KiloBytes. However, I just tried formatting a small 64MB miniSD I have that came with my E70 and the Format utility told me that the format cannot be completed because the cluster size (I selected 4096 Bytes) is too small for the file system (I selected FAT32 for that). Looks like a more robust formatting utility (Partition Magic would be the obvious one to try here) is needed to try to format with FAT32 but larger cluster size. I was able to format my 64MB with FAT32 but only with a 512 Bytes (or half of a kiloByte) cluster size. Curiously, my E70 was able to read from and write to that card just fine. I don't have a 4GB miniSD card to try, however, I don't think it would work if the card is bigger than 2GB.