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NOTE:
This guide is provided "as is" without any warranty.
I will not be liable for any damaged caused by missuse
of all the information written on this guide.
Do this at your own risk!
Hack : Increase MMC/SD Card Capacity
Risk Level: LOW
REQUIREMENTS
- A card reader/writer
- USB Data Cable and your phone (If you don't have a card reader/writer)
PREPARATION
FORMATTING THE CARD
USING A CARD READER/WRITER
- Insert your MMC/SD Card on your card reader
- Click on Start > Right click on "My Computer" > and select "Manage"
- Navigate to "Storage" > and click on "Disk Management"
- Select your MMC/SD card from the list off drive
- Right click on your card and select "Format"
- Refer to the formatting opitions below
| Formatting 64 - 256 MB MMC |
| Volume Label |
Anything |
This will be your card's name |
| File System |
FAT |
Optimized for MMC |
| Allocation unit size |
8192 |
Smallest allocation size for 64-256 MB MMC |
| Formatting 512MB - 1GB MMC |
| Volume Label |
Anything |
This will be your card's name |
| File System |
FAT32 |
Optimized for 512 and up
MMC |
| Allocation unit size |
512 |
Smallest allocation size for 512MB - 1GB MMC |
| Formatting 128MB - 4GB SD Card |
| Volume Label |
Anything |
This will be your card's name |
| File System |
FAT32 |
Optimized for 128MB and higher SD Cards |
| Allocation unit size |
512 |
Smallest allocation size
for 128MB and Higher SD Cards |
HOW DOES IT WORK
By default, FAT is the file system of MMC and SDC on Windows and mobile phones.
The table below shows the difference of FAT and FAT32 File System.
| FAT File System |
| Card Capacity |
Default Allocation Size |
Smallest Cluster Size |
Equivalent file size per 1Byte |
16MB
to
256 MB |
16KB |
8KB |
16KB |
| FAT32 File System |
| Card Capacity |
Default Allocation Size |
Smallest Cluster Size |
Equivalent file size per 1Byte
|
256 MB
to
16GB |
6KB |
512Byte |
6KB |
Larger cluster size means more potentially wasted space.
Lets say you have 1000 files which have 1k of data each.
BEST CASE SCENARIO:
- Use 1 Meg to store them all.
WORST CASE SCENARIO:
- Each 64k cluster only holds 1k, leading to 64Megs required to store of which 63 Megs is wasted.
- 98.4% Waste
OTHER CASE:
- It requires 4Megs to store, in which case you have 3Megs of wasted space.
- 75% Waste
In short, you should allocate the smallest possible cluster size for you to store more files on your MMC/SDC
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