Downloading Sounds and Space
When our app downloads sounds and files from our network to some temporary folder. Even if you have an external SSD connected, our app needs the internal space in order to unpack and process the samples. This is especially important for iOS apps, due to Apple's Sandboxing rules.
As a result, our app still needs free space of your internal drive even if the Samples folder is on an external SSD. After the download finishes, the ZIP file is extracted to the Samples folder, and then deleted, which frees up the internal space again.