diff --git a/lib/link/seven_fs/getfreemem.c b/lib/link/seven_fs/getfreemem.c
index 0051649..0ffbee3 100644
--- a/lib/link/seven_fs/getfreemem.c
+++ b/lib/link/seven_fs/getfreemem.c
@@ -34,6 +34,56 @@ int CASIO_EXPORT casio_sevenfs_getfreemem(sevenfs_cookie_t *cookie,
 {
     int err;
     casio_link_t *handle = cookie;
+	const char *devname = (path->sevenfs_path_dev != 0xFF) ? 
+                          &path->sevenfs_path_data[path->sevenfs_path_dev] : 
+                           NULL;
 
+    /* Some checks */
+    chk_handle(handle);
+    chk_active(handle);
+    if (devname == NULL)
+        return (casio_error_op);
+
+    /* Send command packet */
+    if ((err = casio_seven_send_cmdfls_reqcapacity(handle, devname))) {
+        msg((ll_fatal, "Couldn't send request/didn't receive answer"));
+        return (casio_error_unknown);
+    }
+
+    /* Check response packet */
+    if (response.casio_seven_packet_type == casio_seven_type_nak
+     && response.casio_seven_packet_code == casio_seven_err_other)  {
+        msg((ll_fatal, "File system probably doesn't exist"));
+        return (casio_error_device);
+    } else if (response.casio_seven_packet_type != casio_seven_type_ack) {
+        msg((ll_fatal, "Didn't receive ack ro known error..."));
+        return (casio_error_unknown);
+    }
+
+    /* Swap roles */
+    msg((ll_info, "Sending roleswap"));
+    if ((err = casio_seven_send_roleswp(handle))) {
+        msg((ll_fatal, "Couldn't swap roles"));
+        return (err);
+    } else if (response.casio_seven_packet_type != casio_seven_type_cmd
+            || response.casio_seven_packet_code != 0x4C
+            || !response.casio_seven_packet_args[4]) {
+        msg((ll_fatal, "Didn't receive expected comand"));
+        return (casio_error_unknown);
+    }
+
+    /* Decode thingy */
+    *capacity = response.casio_seven_packet_filesize;
+
+    /* ack and check for the roleswap */
+    msg((ll_info, "Return ack and wait for roleswp"));
+    if ((err = casio_seven_send_ack(handle, 1))) {
+        msg((ll_fatal, "Unable to send ack"));
+        return (err);
+    } else if (response.casio_seven_packet_type != casio_seven_type_swp) {
+        return (casio_error_unknown);
+    }
+
+    /* No error */
     return (0);
 }
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