Make my sd card my defalt storage on om Htc

Solution
Well it is going to depend on what version of Android the phone is using. If it is anything prior to "Marshmallow" then no you can't do that. However, if it is already using, or you can upgrade it to, "Marshmallow", then as long as the manufacturer hasn't restricted this option (which sadly some do) you should be able to use the following information to change the SD card to "Internal" storage.


How to turn external SD card into internal storage on "Marshmallow".

NOTE: Please be sure you start with a blank SD card. It needs to be blank because when the card is converted to "Internal" storage, it will be formatted (wiped) and encoded (making the cards data only readable by that device).

1. Go to device “Settings”, then select...
Well it is going to depend on what version of Android the phone is using. If it is anything prior to "Marshmallow" then no you can't do that. However, if it is already using, or you can upgrade it to, "Marshmallow", then as long as the manufacturer hasn't restricted this option (which sadly some do) you should be able to use the following information to change the SD card to "Internal" storage.


How to turn external SD card into internal storage on "Marshmallow".

NOTE: Please be sure you start with a blank SD card. It needs to be blank because when the card is converted to "Internal" storage, it will be formatted (wiped) and encoded (making the cards data only readable by that device).

1. Go to device “Settings”, then select “Storage”.
2. Select your "SD Card", then tap the “three-dot menu“ (top-right), now select “Settings” from in there.
3. Now select “Format as internal”, and then “Erase & Format”.
4. Your SD Card will now be formatted as internal storage.
5. Reboot your phone.

NOTE: If you don't reboot the phone, many things may not work correctly, so make sure you do.

 
Solution