[Android Head-Units] MrReis:
Has anyone tried the "Erase All Content" option in the factory settings? If so, then what does if actually do? Is "ALL" content erased (need to load the firmware) or are just all the settings set back to their factory default?

I was trying to figure out what some of the factory settings are for and kind of messed things up. My HU used to have a factory setting in "Others" named "Last Memory" but now its gone. I think it had a "Remember" and an "Unremember" setting. I tapped on one of the settings (I think it was "Remember") and I think a dialog box opened asking to use the "Internal SD" or "External SD." Then I think I tapped on "External SD," and I think I then backed out of the factory settings without saving anything.

Some time later I tapped on the "MP Mode" factory setting and icons for saving saving the settings to the SD card or the USB storage were displayed. I tapped on the "save factory settings to SD" icons. After that when I viewed the contents of the SD card two new files were present: "ts8227Lfactory.bin" and "tssysteminfo.txt."

After this I noticed that the radio station presets, the audio adjustments of everything (volume, equalizer) were not being saved between HU power cycles. The music and radio station being played was not automatically resumed after a HU power cycle. Then I noticed that any changes I made to the factory settings were also not being saved between HU power cycles. Interestingly (or not) the SWC settings and the last played music (source, track and time) were being saved between HU power cycles (although the music didn't start automatically).

The "Reset All Settings" option in the "Car Infotainment" "Common" settings did not restore settings being saved between power cycles. I didn't want to try the "Erase All Content" option in the factory settings or HW reset (using the RST button on the HU front panel) because I didn't know if I would have to reload the firmware, or not, after that.

I thought the "ts8227Lfactory.bin" file on the SD card may have something to do with the settings not being saved between power cycles. So when the HU was powered down I removed the SD card. Then I powered the HU up set the radio presets and all the audio adjustments. After a power cycle I found that all of the settings were being saved between power cycles as well as changes I made to the factory settings. EXCEPT the equalizer settings are still not being saved between power cycles,

Does anyone know how to restore the "Last Memory" setting in the Factory settings "Others" settings? Does anyone know how to get the equalizer settings to be saved between power cycles?

The following is my half baked explanation as to why my HU didn't save many settings between power cycles. I believe that the HU stores the factory settings and backs up the factory settings to files with the same name (i.e., "ts8227Lfactory.bin"). I further believe that the HU must keep some way to validate the factory settings file external to the settings file. If the preceding is correct, then my guess as to why my many of my HU's settings were not being saved between power cycles is that first I unintentionally moved the "ts8227Lfactory.bin" file where the HU settings are stored to the external SD card. Then I backed up my HU's factory settings to the SD card which overwrote the "ts8227Lfactory.bin" file the HU uses to save factory settings. The settings I backed up to SD card were different than the settings in the settings saved by the HU in the "ts8227Lfactory.bin" file. So after that when the HU loaded the settings from the "ts8227Lfactory.bin" file when the HU was powered on the HU could not validate settings and fell back to the default settings. But not sure why the HU then wouldn't save the factory settings by overwriting the backup "ts8227Lfactory.bin" on the CD card. I believe that removing the SD card forced the HU to write the factory settings file back to its default location (where ever that is).