Use URL-based approach to work with file system instead of string-based

[dersim-davaod]

Description

https://developer.apple.com/library/archive/documentation/FileManagement/Conceptual/FileSystemProgrammingGuide/ recommends to use URL-based approach to work with files/directories. At the same time we have places in code where string-based approach prevails.

Goal

Improve and simplify the code to follow best practices and recommendations from Apple.

Steps

• [ ] TBD
• [ ] Tested and acceptance criteria is matched (result matches the goal)