Prerequisites:
- PS Vita with FW version between 3.00 and 3.52 (tested on FW 3.51)
- Email account which can be accessed through the PS Vita email application
- Computer with Mozilla Thunderbird installed and configurated
- Computer with QCMA installed (avoid some OpenCMA limitations) or any other solution which allow to read/write inside ux0:pspemu (PSP homebrew, Rejuvenate with VitaShell)
Preparation:
On computer with Mozilla Thunderbird:
- Create a new message
- Attach the file "LargerDump.png" (by drag&dropping the file inside the new message edition panel)
- Right-click on the file to rename it with the following name: "\..\..\..\email\message\mail.db" (remove the quotation marks)
- Send the message for the email account which is configured on the PS Vita email application
If your computer has QCMA (or even OpenCMA):
- Copy the folder "DUMP" inside your PSP saves for PS Vita folder (by default on Windows "%userprofile%\PS Vita\PSAVEDATA\vita_id_for_cma\")
- Send the PSP save named "DUMP" to your PS Vita
If you use a solution directly on your PS Vita:
- Create a directory named "DUMP" in the folder "ux0:pspemu/PSP/SAVEDATA/" (or "ms0:/PSP/SAVEDATA/")
- Restart your PS Vita
On the PS Vita email application:
- Open the message you previously send through Mozilla Thunderbird
- Click on the attachment
- When the panel "Cannot display this picture", completly close the email application (DO NOT CLICK ON "OK"!)
- Reopen the email application
- Reconfigure your email account access
Dump any file:
Send an email to your email account configurated on your PS Vita:
- The subject must be the path of the file (for example, "ux0:email/message/mail.db")
- Attach any file named "#1" (with a size of at least 1 byte, for example the file given in this archive)
Inside the PS Vita email application
- Open the email you just sent, the attachment should be renamed as something which starts with "\\..\\..\\..\\pspemu\\PSP\\SAVEDATA\\DUMP\\"
- On the right side, click on "Forward" button
- It should take some time to open the "Forward" message editor (the time depends on the file size)
- In the "Forward" message editor, set the airplane mode
- Click on the attachment and then on "See"
- It must "slitly" freeze and then display a "Cannot display this picture" message (or crash if the file you want to dump is too huge)
- Completly close the email application (DO NOT CLICK ON "OK"!)
If you use CMA on your computer:
- Simply backup the PSP save file "DUMP"
- OpenCMA will fail if a file you dumped has a name more than 8 characters or an extension with not exactly 3 characters, use QCMA instead
If you use a solution directly on your PS Vita:
- The dumped file should be inside "ms0:/PSP/SAVEDATA/DUMP" or "ux0:pspemu/PSP/SAVEDATA/": do as you wish with it!
Limitations:
The dumping process in the email application is hazardous:
- Sometimes it fails (especially if there was no freeze before the "Cannot display this picture" message)
- In this case, restart your PS Vita and repeat the dump phase inside the PS Vita email application
- Sometimes you can directly click on the attachment (no need to go inside "Forward"), particularly if you successly dump the file at least one time
- The file path must at least contains a '/', if the file is at the root of the targeted partition, add a '/' after ':' (for example, "ux0:/id.dat")
- If the file is too huge, the email application will crash (in my case, it was when the file was bigger than 16MB but it is not a fixed limit)
Thanks to mr.gas for all his hints
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