Aparted app is for customizing your SD cards from your phone. You can use it to change the partition name, type & size or repair which allows you to create multiple partitions on one SD card. Reason why I use it is because I have a rooted phone and another apps called Link2SD which allows me to install and keep my apps on my SD card rather than using up all my phones memory. Aparted allows for this to happen and is usually easy to do. It allows for the right SD card customization to take place for easy setup for the extra partition to store my apps on while reserving space for my videos and photos on the main SD cards partition.