The first thing that grabs your attention on OI File Manager is the intuitive user interface. So much so that there is no need to consult a tutorial or instruction manual before you start using it. It also has some great details such as showing miniature images when you are working with photos.
Along with copying, pasting and deleting files, you can send them directly to your e-mail or upload them to Dropbox directly from the app. You just need to put your finger over the file and choose from the list of options that appear.
OI File Manager is a really comprehensive file management tool, and with it, your memory card will be so much easier to work with.