Feature/4 download of data

1. What does the MR / why we need it:

-Load Files from an external source

2. Make sure that you've checked the boxes below before you submit MR:

• I have read and applied the design rules
• Was the feature branch updated from the develop branch and were there no problems?
• Have new tests been created if possible?
• Are all tests running ?
• Was documentation made if necessary?