getting ahead of yourself.
Where are you seeing the -fs option?
You ca do a full clean wipe of the internal sdcard by doing this in SS:
In SS recovery go to "Advanced" > "Teminal Command" > Scroll down and tap "sdcard" > at the bottom right hit "Select" > then type the following command and hit "Go".
rm -rf ./*
ugggh! commands....
there will be day when humans do everything simply by pushing a button... for now, we have to get past the boot loop issue as presented in this post ... just know, for next time,....3.75 ....has an option...
excerpt from Hash Blog
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Terminal Command: Also very handy for those once in a while moments when you have to do something via terminal but don’t have adb handy. USE WITH CAUTION
Settings:
Here you can turn on and off signature verification of .zip files
Force MD5 sum checks on .zip files prior to flashing
“Use rm -rf instead of formatting” will always be checked so that Safestrap will not break partition signatures on locked devices
There are a few other checkbox options in here. Please know what you are doing.
Simulate most actions for theme testing. If you have this checked, Safestrap/TWRP will not perform most actions but show the dialog boxes so you can review theme elements. If you turn this on, it STAYS ON till you turn it off. And will show “SIMULATING ACTIONS” up top.
Set the Time Zone (use “Set Time Zone” button after choosing which time zone you want)
Restore Defaults. Use this to reset all options back to default as it came when you installed for the first time. Does not erase backups or ROM-slots, tho it might change the active slot.
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http://blog.hash-of-codes.com/how-to-safestrap/
