Update twrp.flags

recovery/root/etc/twrp.flags

@@ -27,4 +27,4 @@
 # Removable partitions
 #/external_sd	auto		/dev/block/mmcblk0p1	/dev/block/mmcblk1	flags=storage;wipeingui;removable
 /usb-otg	auto		/dev/block/sdg1		/dev/block/sdg		flags=storage;wipeingui;removable
-/storage  f2fs    /data/media/0                       flags=display="Internal Storage";usermrf;backup=1;fsflags="bind"
+/storage  ext4    /data/media/0                       flags=display="Internal Storage";usermrf;backup=1;fsflags="bind"