128MB ms = 123.57 MB Only?

does it mean its defective? 😮

😉 Don't worry... that's very normal actually... hehehe...

It's same goes to harddrive too..... 2G doesn't mean you will have 2G.

Yes, it's normal indeed! The card has about 128.000.000 bytes. The conversion from bytes to megabytes is 128.000.000/1024/1024. As you can understand, that's not 128MB anymore, only about 122/123MB

Has anyone tried it?

Sony is stealing memory from your MS-duo by the way they format the memory stick on the P800. When they format the stick they do this by using a cluster size of 16384 bytes which really gives a lot of slack space.
This means that a file which is only 100 bytes in size will take up 16,4 kilobytes on your MS-duo, which really is a waste of memory.

So when you have the possibility to format the stick on a memory card reader on your PC then do so. It will save you a lot of memory.

Below you see a table of formatting the stick with different cluster sizes and the free memory you will have when you install about 7220k of data.

Cluster size/ Free / Total
1024 / 8111k / 15717k
2048 / 7746k / 15748k / (my preference for 16M and 32M MS-duo)
4096 / 6904k / 15764k / (my preference for 64M and 128M MS-duo)
8192 / 5128k / 15768k
16384 / 1392k / 15776k / (This is the Sony default)

There is however one disadvantage to decreasing the cluster size and that is speed degradation. Therefor my advice is to format your MS-duo with a cluster size of 2048 or 4096 which gives a good balance between free memory and speed.

Notes:
1 This trick will also work with on a 32M, 64M, and 128M MS-duo
2 The increase in free memory will be a lot less when you have only large files on your MS-duo

First make a backup before you start with this
To format the MS-duo on your PC use the following format command in a command window.
FORMAT S: /A:2048 /X
or
FORMAT S: /A:4096 /X
where S: is the drive letter
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Regards, Betatester

Will that give me atleast 126-127? 😊