If you're a Windows user focused on reclaiming disk space and prefer a straightforward, no-cost tool, choose WinDirStat. Its treemap visualization quickly reveals large files, making it ideal for identifying what's consuming your disk space. Just be prepared for a dated interface and potentially slow initial scans on large drives.
On the other hand, if you're looking for a modern file management experience with features like tabs, dual panes, and better tagging, Files is the way to go. Its sleek interface is suited for solo users who want a more advanced explorer while still being free and open source. However, be cautious if you need cross-platform compatibility or require more advanced features like scripting or FTP, as this tool won't meet those needs.