The storage location might vary based on which system you are using and which way you are running the node and farmer.
Subspace Desktop
The location will be specified on setup, in general it is the default application store for your OS.
Windows: AppData/Roaming/subspace-desktop
macOS: Library/Application Support/subspace-desktop
Linux: usr/local/subspace-desktop
Binary
This location can be specified as a command flag for the node with the --base-path flag and the farmer with the --custom-path flag.
Docker
A Docker Volume is created and automatically mounted, check your docker volumes. This can be customized in the docker-compose.yml in the documentation.