Swithced to Q type which is at least 8 bytes unseigned

py/read_storage.py

@@ -240,7 +240,7 @@ def read_epilog(file):
 
     file.seek(-4-OFST_SIZE*num_records,os.SEEK_END)
     # the last record is EOF, and the very last offset has nothing
-    raw = array('L', file.read(OFST_SIZE*(num_records-2)))
+    raw = array('Q', file.read(OFST_SIZE*(num_records-2)))
     raw.byteswap()
     # print('Number of records: ', len(raw))
     # print(raw.itemsize)