fix(TransferService)-fix-url-attachments-as-files

[pawel-baran-se]

Description

• fix copying of files with url as a value

Fixes # (Issue)

Type of change

Please delete options that are not relevant.

• Minor change (non-breaking change, e.g. documentation adaption)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that causes existing functionality to not work as expected)

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix or my feature works
• New and existing tests pass locally with my changes
• My changes contain no console logs