By and large the SD camera connection kit only works to import photos and videos onto the iPad. And these photos and videos must follow a specific naming convention to be seen by the iPad.
There are some devices out there that can import and export data. FOr example I have a lexar micro sd card reader that uses apps made by Lexar to import/export data. BUt it is a specific device and has to use an app to move the data around.
Using the apple SD card reader all you can do is import photos and videos. THere is zero support for exporting data off the ipad using that device.
If your camera takes photos using the common naming convention (for example IMG_3456.jpg....basically 8 characters), then the ipad will import the photos and videos. It should also upload them to your iCloud if you have that enabled...but be careful because iCloud is not a photo backup service, it’s a syncing service and if you delete an image off the SD card and iPad it will also be deleted off iCloud.