SwiftData - Images & External Storage Attribute

Hey there, I am having a question which hopefully someone can answer. I am developing an App and wanted to store Images in SwiftData with the @External Storage Attribute. I get it to work with a single image and also with an array of images but...saving 1 Image shows a storage space of about 38 bytes but when I store an array of 3 Images the storage in the SQL Database (Blob Type) increases to over 8 Million Bytes?

Is this a bug or is this what it is?

I am having a direction for a workaround but it would be more convenient if it would work with SwiftData for an array of images same as it does for 1 image.

Thanks for any clarification.