diff --git a/src/calibre/devices/prs505/driver.py b/src/calibre/devices/prs505/driver.py
index c55936be2d..4c14565c2d 100644
--- a/src/calibre/devices/prs505/driver.py
+++ b/src/calibre/devices/prs505/driver.py
@@ -36,15 +36,15 @@ class PRS505(USBMS):
     VENDOR_NAME        = 'SONY'
     WINDOWS_MAIN_MEM   = re.compile(
             r'(PRS-(505|300|500))|'
-            r'(PRS-((700[#/])|((6|9)00&)))'
+            r'(PRS-((700[#/])|((6|9|3)(0|5)0&)))'
             )
     WINDOWS_CARD_A_MEM = re.compile(
             r'(PRS-(505|500)[#/]\S+:MS)|'
-            r'(PRS-((700[/#]\S+:)|((6|9)00[#_]))MS)'
+            r'(PRS-((700[/#]\S+:)|((6|9)(0|5)0[#_]))MS)'
             )
     WINDOWS_CARD_B_MEM = re.compile(
             r'(PRS-(505|500)[#/]\S+:SD)|'
-            r'(PRS-((700[/#]\S+:)|((6|9)00[#_]))SD)'
+            r'(PRS-((700[/#]\S+:)|((6|9)(0|5)0[#_]))SD)'
             )