google drive is an android themers best friend
Whenever I assemble a theme, I start with a Google Drive folder where I can dump everything I find. There's nothing more annoying than trying to recreate a theme and finding out you lost that perfect wallpaper. I also don't have to hassle with plugging in my phone to get icons from my computer onto the phone they're meant for. Sometimes, you can even pull icons or wallpapers into your launcher without having to download them first as Drive is accessible in Documents or My Files for many phones.