Dynamic table reference to pool of images, where to store the images?

[Katzyon]

Hi,
I'm using optogenetics to present randomly selected images to a neuronal culture (e.g. I have 10 images randomly selected 1000 times).
For each presentation, I record the presentation time along with the index of the displayed image in a dynamic table (presentation_table), which I then store in the processing group using proc_module.add_data_interface(presentation_table).
I also need to save the pool of images.
What is the standard practice for storing the pool of images?
Should I use an ImageSeries (row data), or should I save them as general metadata using add_image?

Thank you very much for helping,
Yonatan.