diff -r 12e494045696 sys/src/cmd/nusb/disk/disk.c
--- a/sys/src/cmd/nusb/disk/disk.c	Mon Feb 13 22:28:35 2017 +0100
+++ b/sys/src/cmd/nusb/disk/disk.c	Wed Feb 15 05:53:52 2017 -0800
@@ -939,7 +939,7 @@
 			continue;
 		csp = ep->iface->csp;
 		sc = Subclass(csp);
-		if(!(Class(csp) == Clstorage && (Proto(csp) == Protobulk)))
+		if(!(Class(csp) == Clstorage && (Proto(csp) == Protobulk || Proto(csp) == Protouasp)))
 			continue;
 		if(sc != Subatapi && sc != Sub8070 && sc != Subscsi)
 			fprint(2, "disk: subclass %#ulx not supported. trying anyway\n", sc);
diff -r 12e494045696 sys/src/cmd/nusb/disk/ums.h
--- a/sys/src/cmd/nusb/disk/ums.h	Mon Feb 13 22:28:35 2017 +0100
+++ b/sys/src/cmd/nusb/disk/ums.h	Wed Feb 15 05:53:52 2017 -0800
@@ -14,6 +14,7 @@
 	Protocbi =	0,	/* control/bulk/interrupt; mainly floppies */
 	Protocb =	1,	/*   "  with no interrupt; mainly floppies */
 	Protobulk =	0x50,	/* bulk only */
+	Protouasp =	0x62,	/* USB attached SCSI protocol */
 
 	Subrbc =	1,	/* reduced blk cmds */
 	Subatapi =	2,	/* cd/dvd using sff-8020i or mmc-2 cmd blks */
diff -r 12e494045696 sys/src/cmd/nusb/ptp/ptp.c
--- a/sys/src/cmd/nusb/ptp/ptp.c	Mon Feb 13 22:28:35 2017 +0100
+++ b/sys/src/cmd/nusb/ptp/ptp.c	Wed Feb 15 05:53:52 2017 -0800
@@ -555,7 +555,7 @@
 		x->handle = NUM(path);
 		x->store = GET4(p);
 		x->format = GET2(p+4);
-		if(x->format == 0x3001 && GET2(p+42) == 1){
+		if(x->format == 0x3001){
 			x->d.qid.type = QTDIR;
 			x->d.mode = DMDIR|0777;
 		} else {