This is the best SD card data storage app for Android devices, developed by a company based in Japan. It's free to use and has no ads. It's a great way to store important data such as photos, videos, contacts, calendars, and messages.

The app lets you use your SD card as a storage device. It's compatible with both SD and SDXC cards, and it's easy to use. You can save data to the SD card using the built-in save function.

If you want to move your data to a new device, you can use the built-in copy function to copy your data from your old device to your new one. You can also use the backup function to back up your data.

This app has a function that lets you schedule backups. It's easy to use and enables you to schedule backups for the day, the week, or the month.