* Update common-issues-fixes.md
Added more context to an existing error and an additional error with info.
* Add minor info to step 7
Some people try changing the boot title for some reason before actually launching the environment. So holding + does nothing for them
* Update backup instructions
Some minor changes
* Update nand backup instructions
Some minor changes with an extra step
* Update sd-preparation.md
Added a note about replacing files on a mac
* Minor change in sd-preparation
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