Dsf.7z -

If a .dsf file is itself a 7z-compressed archive (sometimes indicated by a .dsf.7z extension or simply renamed), you can rename it back to .7z to extract it. :

Standard for ZIP/GZip; faster but offers lower compression ratios than LZMA. Potential Issues DSF Usage In X-Plane DSF.7z

Often better for text-heavy files, such as raw script versions of DSF data. DSF.7z

A container format used by X-Plane to store scenery data, including mesh, terrain, and objects. It is designed to be extensible, allowing new features to be added without changing the base file format. DSF.7z

Default; provides high compression and fast decompression for most data.