Thank you for your post. Unfortunately, photos taken within the app will download to your default photo storage method. Therefore, if you have your photos saved to your SD card instead that would help your storage issue.
Additionally, if you didn’t know, you can also choose the storage location for your custom imported maps which you can change to the SD card as well. However, this isn’t retroactive. Only new map imports will be saved on the SD card.
Lastly, SD card storage isn’t always the most reliable method to store your data. There are many cases where users have data stored on there and the SD card fails. If you do decide to save your data on there, be sure to back it up regularly to make sure you don’t lose anything important.
If you have any questions don’t hesitate to let me know.