diff --git a/libraries/libwhb/include/whb/hfio.h b/libraries/libwhb/include/whb/hfio.h
new file mode 100644
index 000000000..f48323c10
--- /dev/null
+++ b/libraries/libwhb/include/whb/hfio.h
@@ -0,0 +1,73 @@
+#pragma once
+#include <wut.h>
+
+/**
+ * \defgroup whb_hfio Host I/O access
+ * \ingroup whb
+ * @{
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum WHBWellKnownHostDirectory
+{
+   //! A way to quickly reference the emulated MLC directory on a attached host
+   //! pc.
+   //!
+   //! You should prefer to use this for compatability (as it will be the same
+   //! across systems, even with separate paths), and it will usually be fewer
+   //! characters meaning the actual path can be used by more of the important
+   //! stuff.
+   WHB_MLC_HOST_DIRECTORY           = 0,
+   //! A way to quickly reference the emulated SLC directory on a attached host
+   //! pc.
+   //!
+   //! You should prefer to use this for compatability (as it will be the same
+   //! across systems, even with separate paths), and it will usually be fewer
+   //! characters meaning the actual path can be used by more of the important
+   //! stuff.
+   WHB_SLC_HOST_DIRECTORY           = 1,
+   //! A way to quickly reference the emulated directory of the 'optical disc'
+   //! on a attached host pc.
+   //!
+   //! You should prefer to use this for compatability (as it will be the same
+   //! across systems, even with separate paths), and it will usually be fewer
+   //! characters meaning the actual path can be used by more of the important
+   //! stuff.
+   WHB_DISC_HOST_DIRECTORY          = 2,
+   //! A way to quickly reference the emulated directory of the current titles
+   //! save directory.
+   //!
+   //! You should prefer to use this for compatability (as it will be the same
+   //! across systems, even with separate paths), and it will usually be fewer
+   //! characters meaning the actual path can be used by more of the important
+   //! stuff.
+   WHB_SAVE_HOST_DIRECTORY          = 3,
+   //! A way to quickly reference an attached network drive of the host pc.
+   //!
+   //! You should prefer to use this for compatability (as it will be the same
+   //! across systems, even with separate paths), and it will usually be fewer
+   //! characters meaning the actual path can be used by more of the important
+   //! stuff.
+   WHB_NETWORK_DRIVE_HOST_DIRECTORY = 4,
+} WHBWellKnownHostDirectory;
+
+BOOL
+WHBMountHostFileIO();
+
+char *
+WHBGetHostFileIOMountPath();
+
+char *
+WHBPathForWellKnownHostDirectory(WHBWellKnownHostDirectory directory);
+
+BOOL
+WHBUnmountHostFileIO();
+
+#ifdef __cplusplus
+}
+#endif
+
+/** @} */
diff --git a/libraries/libwhb/src/hfio.c b/libraries/libwhb/src/hfio.c
new file mode 100644
index 000000000..6491cfba8
--- /dev/null
+++ b/libraries/libwhb/src/hfio.c
@@ -0,0 +1,122 @@
+#include <coreinit/filesystem.h>
+#include <coreinit/memdefaultheap.h>
+#include <string.h>
+#include <whb/hfio.h>
+#include <whb/log.h>
+
+
+static BOOL
+   sHFIOMounted = FALSE;
+
+static char
+   sHFIOMountPath[128] = {0};
+
+static FSClient
+   sHFIOClient;
+
+BOOL
+WHBMountHostFileIO()
+{
+   FSCmdBlock cmd;
+   FSMountSource mountSource;
+   FSStatus result;
+
+   if (sHFIOMounted) {
+      return TRUE;
+   }
+
+   FSInit();
+
+   result = FSAddClient(&sHFIOClient, FS_ERROR_FLAG_ALL);
+   if (result != FS_STATUS_OK) {
+      WHBLogPrintf("%s: FSAddClient error %d", __FUNCTION__, result);
+      return FALSE;
+   }
+
+   FSInitCmdBlock(&cmd);
+   result = FSGetMountSource(&sHFIOClient, &cmd, FS_MOUNT_SOURCE_HFIO, &mountSource, FS_ERROR_FLAG_ALL);
+   if (result < 0) {
+      WHBLogPrintf("%s: FSGetMountSource error %d", __FUNCTION__, result);
+      goto fail;
+   }
+
+   result = FSMount(&sHFIOClient, &cmd, &mountSource, sHFIOMountPath, sizeof(sHFIOMountPath), FS_ERROR_FLAG_ALL);
+   if (result < 0) {
+      WHBLogPrintf("%s: FSMount error %d", __FUNCTION__, result);
+      goto fail;
+   }
+
+   sHFIOMounted = TRUE;
+   return TRUE;
+
+fail:
+   FSDelClient(&sHFIOClient, FS_ERROR_FLAG_ALL);
+   return FALSE;
+}
+
+char *
+WHBGetHostFileIOMountPath()
+{
+   return sHFIOMountPath;
+}
+
+char *
+WHBPathForWellKnownHostDirectory(WHBWellKnownHostDirectory directory)
+{
+   // The host path is 128 bytes, and the maximum we can append is 15 bytes, for a final size of 143.
+   char *finalPath = (char *)MEMAllocFromDefaultHeap(143);
+   if (finalPath == NULL) {
+      return NULL;
+   }
+
+   // Ensure we get a NULL terminator, mimic calloc.
+   memset(finalPath, 0, 143);
+   strcat(finalPath, sHFIOMountPath);
+   strcat(finalPath, "/");
+   switch (directory) {
+      case WHB_MLC_HOST_DIRECTORY:
+         strcat(finalPath, "%MLC_EMU_DIR");
+         break;
+      case WHB_SLC_HOST_DIRECTORY:
+         strcat(finalPath, "%SLC_EMU_DIR");
+         break;
+      case WHB_DISC_HOST_DIRECTORY:
+         strcat(finalPath, "%DISC_EMU_DIR");
+         break;
+      case WHB_SAVE_HOST_DIRECTORY:
+         strcat(finalPath, "%SAVE_EMU_DIR");
+         break;
+      case WHB_NETWORK_DRIVE_HOST_DIRECTORY:
+         strcat(finalPath, "%NETWORK");
+         break;
+   }
+   return finalPath;
+}
+
+BOOL
+WHBUnmountHostFileIO()
+{
+   FSCmdBlock cmd;
+   FSStatus result;
+
+   if (!sHFIOMounted) {
+      return TRUE;
+   }
+
+   FSInitCmdBlock(&cmd);
+
+   result = FSUnmount(&sHFIOClient, &cmd, sHFIOMountPath, FS_ERROR_FLAG_ALL);
+   if (result < 0) {
+      WHBLogPrintf("%s: FSUnmount error %d", __FUNCTION__, result);
+      return FALSE;
+   }
+
+   result = FSDelClient(&sHFIOClient, FS_ERROR_FLAG_ALL);
+   if (result < 0) {
+      WHBLogPrintf("%s: FSDelClient error %d", __FUNCTION__, result);
+      return FALSE;
+   }
+
+   sHFIOMounted = FALSE;
+   return TRUE;
+}