Where does Fault Tolerance store the primary and secondary virtual machine files?

Using only local storage for FT is impossible because the secondary VM runs on a different host and must access the same virtual disk files, which requires shared storage.

Not all FT-related files reside on shared storage - per-host files such as memory swap files are kept on the local datastore of each individual host.

In vSphere Fault Tolerance, the primary and secondary VMs both access the same VMDK files located on shared storage, which must be accessible from both hosts simultaneously. However, host-local files such as VM swap files (.vswp) are stored on the local storage of each respective host, meaning FT inherently depends on both shared and local storage during operation.

SSD is a physical storage media type, not a logical storage location category, and FT has no requirement to use SSD exclusively.