how to set default storage location for downloads in android tablet

Solution
Well it is going to depend on what version of Android your tablet is running. If it is running "Marshmallow", and the manufacturer hasn't restricted the option to do this, you can set the SD card as your default storage by turning it into "Internal" storage rather than "External".

However, if you are running anything lower than "Marshmallow", or aren't able to upgrade to it, then you cannot do this.


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 your tablet is running. If it is running "Marshmallow", and the manufacturer hasn't restricted the option to do this, you can set the SD card as your default storage by turning it into "Internal" storage rather than "External".

However, if you are running anything lower than "Marshmallow", or aren't able to upgrade to it, then you cannot do this.


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 tablet.

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

 
Solution