Do you need to know how to use android's file:///sdcard/ access permission? You'll be glad to know that you're in the right place. You see, it isn't as hard as you may think to work with your android device's internal memory. Believe it or not, there are some ways for you to work with these types of resources. And they aren't as complicated as you might think.
The way how to use file explorer with an SD card is pretty simple. You're going to need to have a file manager on your android phone. You can get this from any of the android marketplaces. Once you've got that installed, you'll be good to go. Just open up the app and it should start doing what it was doing before, displaying a list of all of the available storage spaces on your device.
You'll want to select the folder you want to work with. Once you've selected that, just drag and drop your files directly onto the address bar. If you're using a regular URL, you should see the folder you were in previously, but if you're using a URL that the android browser wants to redirect you to, you'll just copy that and paste into that spot. This will open up the address bar, allowing you to go to any of the folders on your SD card. You should immediately see a new folder called Documents, which will be your new home for all of your latest projects.