Hi  @gelli2016,

I found this post, could it perhaps help you?

http://community.k2.com/t5/K2-Blackpearl-Forum-Posts/Multiple-attachments-in-the-smartform/m-p/82861#M24787

I saw with another use they created a second SmartObject.
This SmartObject had an attachment field and a one-to-many relationship with the main SmartObject.

Hope this helps.

Hi @gelli2016,

I would suggested using the File Broker on the K2 Market

http://community.k2.com/t5/K2-blackpearl/File-Service-Broker-v2-0/ba-p/92469

I was able to create a small solution in a couple of minutes.

Below is some screenshot of the creation on the multiple upload

Regards

Heinrich