Upload Files and keep it in a temp folder related to work flow

Hello,

I am asking for ideas

I have a work flow, connected to DATA BASE SAP HANA.

I want to join DATA base data with some manual DATA Based on “Project number”

The idea is to have a DATAAPP, that i can allow the user to upload the files “with standard format for sure”. then this file will be saved in a temp folder related to the work flow. after that and based on widget selection : project selection, the work flow can join the the data between files and data base.

I have an issue that i don’t know how to use “Upload file widget” and store the files in a “temp” folder related to the work?

Any help ?