"HCDisk is a tool able to transfer files to and from several file systems Specific to the Sinclair Spectrum computer and clones." Originally written by George Chirtoaca for win32. This repo contains a fork which aims to port it to Linux.
Check out the readme and [upstream website] (https://sites.google.com/site/georgechirtoaca/projects).
The (Linux) build system uses SCons. To build, run "scons". If a i686-w64-mingw32 toolchain is installed, a win32 binary may be cross-compiled as well.