Is there any stable application for this? I do have an application with varying very high and very low incoming data packets I need to save. They can be really

Is there any stable application for this? I do have an application with varying very high and very low incoming data packets I need to save. They can be really small json documents or have larger files attached (up to 10mb). Kafka would be a perfect fit, but the file size is too big, and saving every attachment first to a cloud storage bucket will cost a lot because of many STORE commands (i would like to merge the files before storing to reduce the cost).