Mihkel Tiks enhanced the Lumi-supercomputer/lumi-userguide repository by consolidating and expanding documentation for FUSE and SquashFS usage on the LUMI HPC platform. He authored a comprehensive guide covering SquashFS creation, mounting within Singularity containers, and provided a direct mounting script, addressing common onboarding challenges for new users. His work involved reorganizing documentation structure, relocating FUSE.md under storage/formats, and clarifying the local nature of FUSE-mounted filesystems on compute nodes. Using Bash and Markdown, Mihkel focused on clear, actionable instructions and integrated stakeholder feedback to improve clarity, resulting in more reliable onboarding and reduced support needs for HPC users.