It is rarely tiny! It takes only 64 KB on your Android phone.
It supports external SD cards.
To install a non-Market application, maybe an .apk file. You needs a tiny tool to browse the SD card, and pick the .apk file. This is simply the tool you got, free, without advertisement, and it is very tiny.
5.0 out of 5 starsSo I was sitting there reading how wonderful AndroidOS 6
ByAmazon Customeron 21 September 2017 - Published on Amazon.com
So I was sitting there reading how wonderful AndroidOS 6.0 Marshmallow was supposed to be and how 6.0 would allow the phone to adopt the SD card as internal memory... I went out and picked up a class 10, 128 gb SD card thinking I would finally see the end of all the "too little space left to install" errors.
Imagine my disappointment when I realized that Boost Mobile deliberately cripples this AOS built-in feature. I was ready to give up and go shopping for a new phone on a new (not Boost Mobile) carrier, when I stumbled across APK Editor.
Using this app I've been able to move almost all of Boost's anti-consumer bloatware to my SD card where the phone can happily find it all but where I can actually use the memory onboard that I bought when I bought the phone.
I will probably drop my carrier when I replace my phone eventually, but thanks to APK Editor I can postpone that for a while. I've freed up 1.4 gb of internal memory and my phone performs better than it ever has... Even when it was new.