PSP Updates has posted an alert from Playstation.com Japan regarding the Sony Memory Stick PRO DUO models MSX-M1GST, MSX-M2GS and PSP-MP1G.

Playstation.com Japan has released an announcement on a free space issue of Sony’s Memory Stick PRO DUO. This issue affects model MSX-M1GST, MSX-M2GS and PSP-MP1G.

The problem happens when you format your memory stick to initialize it. The free space might be less than the designed value. In this situation, you will not be able to save as much data as the designed volume.

To resolve this problem, you need to re-format you memory stick once more. Please note all the data stored on the memory stick will be lost when you perform formatting. Make sure you backup all the useful data from your memory stick before formatting.

Design Volume of the Memory Stick PRO DUO:

MSX-M1GST: 940MB or more
MSX-M2GS: 1850MB or more
PSP-MP1G: 940MB or more

If you are unable to fix this issue by yourself, please contact Sony Tech Support.

This combined with the higher transfer rates of the SanDisk is more than enough reason to stick with SanDisk in my opinion. However, for those of you who have the Sony sticks, this is something to be aware of.


3 Responses to “Sony Memory Stick PRO DUO Free Space Issue”

  1. 1 MitchyD

    I had this exact same problem with my Sandisk 256… I tried reformatting, but lost MORE!

    I’m down to 237 MB on my stick.

  2. 2 Jakanden

    Interesting, I have three SanDisks with no problems on any of them. I have heard of an issue with a local “Recyle bin” type system on the memory sticks where deleted items do not get deleted but unfortunately, I paid scant attention. Might want to look into it.

  3. 3 Dasme

    Yeah, if you have a mac.. or even a pc but I haven’t experienced it on my pc.. Make sure to empty the trash when your PSP is connected. Items that were deleted off the stick will still be in your Trash, and the reported size of your memory stick will be lower.

    I empty my trash, format my stick and everything seems to work.




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