Why EMUMMC Hekate Backup Smaller not backing up all files on SD Card for EMUMMC?

captansam · Apr 18, 2024

Hey there, wondering why my EMUMMC backup file via Hekate is only 12.9GB while my contents on my SD card allocated to the EMUMMC are much larger? For instance I have Retroarch roms on there which are easily 25GB , + 6 Switch Games totalling over 45GB, so why is the EMUMMC Hekate backup not accounting for all my files (ie. Homebrew apps, installed games, installed saves etc.)?

How does the backup work? What does it back up? Can I change it to backup all my files?

petspeed · Apr 18, 2024

The games are located in the Nintendo folder on the sd card. The emummc is what would normally be on the mmc chip (in sysmmc) but in emummc it is either on a separate partition on your SD card (partition based) or files on the sd card outside the Nintendo folder (file based). Hekate only backup emummc, not the Nintendo folder. That is why your backup is smaller than you expect.

Hayato213 · Apr 18, 2024

captansam said:
Hey there, wondering why my EMUMMC backup file via Hekate is only 12.9GB while my contents on my SD card allocated to the EMUMMC are much larger? For instance I have Retroarch roms on there which are easily 25GB , + 6 Switch Games totalling over 45GB, so why is the EMUMMC Hekate backup not accounting for all my files (ie. Homebrew apps, installed games, installed saves etc.)?

How does the backup work? What does it back up? Can I change it to backup all my files?

You would want to check your emummc size.

captansam · Apr 18, 2024

petspeed said:
The games are located in the Nintendo folder on the sd card. The emummc is what would normally be on the mmc chip (in sysmmc) but in emummc it is either on a separate partition on your SD card (partition based) or files on the sd card outside the Nintendo folder (file based). Hekate only backup emummc, not the Nintendo folder. That is why your backup is smaller than you expect.

Ahh Okay, so to make a full proof backup of all my content I should be taking a backup of the SYSMMC, EMUMMC, and a full backup of the SD Card Contents and dump my keys via Lockpick Tool am i right?

What exactly does Lockpick Tool do and how do i use these in future?

Hayato213 · Apr 18, 2024

captansam said:
Hey there, wondering why my EMUMMC backup file via Hekate is only 12.9GB while my contents on my SD card allocated to the EMUMMC are much larger? For instance I have Retroarch roms on there which are easily 25GB , + 6 Switch Games totalling over 45GB, so why is the EMUMMC Hekate backup not accounting for all my files (ie. Homebrew apps, installed games, installed saves etc.)?

How does the backup work? What does it back up? Can I change it to backup all my files?

The backup size has to do with the emunand emummc size you set when you set up the emunand if you set it up like 12.9 GB then it would explain your 12.9GB backup, it only backup what is on the internal storage or the emulated storage of your emunand which is on your SD.

Lockpick is just a tool that derive encryption keys.

captansam · Apr 18, 2024

Hayato213 said:
The backup size has to do with the emunand emummc size you set when you set up the emunand if you set it up like 12.9 GB then it would explain your 12.9GB backup, it only backup what is on the internal storage or the emulated storage of your emunand which is on your SD.

Lockpick is just a tool that derive encryption keys.

Okay so if i take a backup of my EMUMMC from 2 weeks ago vs my EMUMMC from today, how come they are the exact same size? Shouldn't there be a size difference? What data is in the EMUMMC?

I'm trying to see how often to backup my SYS/EMUMMC. Do I need to do to it once every firmware update (ie. 18 to 18.1 or 18 to 19) or how often do I need to do it for best practice?

Hayato213 · Apr 18, 2024

captansam said:
Okay so if i take a backup of my EMUMMC from 2 weeks ago vs my EMUMMC from today, how come they are the exact same size? Shouldn't there be a size difference? What data is in the EMUMMC?

I'm trying to see how often to backup my SYS/EMUMMC. Do I need to do to it once every firmware update (ie. 18 to 18.1 or 18 to 19) or how often do I need to do it for best practice?

That Emummc nand backup is just backup of the emulated internal storage of your emunand, so what ever that emunand that would be your backup size, it won't included installed content on SD card outside of the emummc storage, by default non oled is 29GB and OLED is 58GB NAND size, like I said check your emummc internal storage.

As for backing up you can do a backup when you do a firmware update, you can leave one copy of sysnand nand backup if you don't update the firmware.

Why EMUMMC Hekate Backup Smaller not backing up all files on SD Card for EMUMMC?

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