added clear screen command

demos/host/src/msc_app.c

@@ -95,6 +95,13 @@ void tusbh_msc_mounted_cb(uint8_t dev_addr)
       return;
     }
 
+    puts("---------------------------------------------------------------------");
+    puts("- MASSSTORAGE CLASS CLI IS A NON-MATURE CODE. DISK-WRITING COMMANDS -");
+    puts("- SUCH AS cp(COPY), mkdir(MAKE DIRECTORY) ARE POTENTIAL TO DAMAGE   -");
+    puts("- YOUR USB THUMBDRIVE. USING THOSE COMMANDS ARE AT YOUR OWN RISK.   -");
+    puts("- THE AUTHOR HAS NO RESPONSIBILITY WITH YOUR DEVICE NOR ITS DATA    -");
+    puts("---------------------------------------------------------------------");
+
     f_chdrive(dev_addr-1); // change to newly mounted drive
     f_chdir("/"); // root as current dir