Doesn't Work
I have a CCK with an SD card connected. This app can't see it. Pretty much useless then.
Useless
This seems identical to iExpand. It doesn't detect an SD card attached via the SD card lightning connector, so does nothing at all.

Manage files on external SD cards with this utility. It allows you to copy, move, and back up your contacts directly from your device.
2.2
January 15, 2020
Fix known bugs.
SwitchMemory functions as an external SD card reader/writer. It allows you to copy and move files, and also provides a backup function for your contacts.
Yes, SwitchMemory is available for free. There are no costs associated with downloading or using its core features.
SwitchMemory is designed for iOS devices, including iPhone, iPad, and iPod.
The latest version, 2.2, was released on January 15, 2020. The app was initially released on January 8, 2016.
SwitchMemory has an age rating of 4+, making it suitable for a wide range of users.
No, SwitchMemory does not contain advertisements. It is an ad-free application.
You can perform basic file operations such as copying and moving files directly to and from an external SD card connected to your device.
SwitchMemory specifically offers a backup function for contacts. It does not support backing up the entire phone's data.