CREATE TABLE table_46730 ("Model" TEXT, "Memory  (  RAM  ) " TEXT, "Storage  (  flash  ) " TEXT, "Operating system version" TEXT, "Memory card" TEXT, "Weight ,  dimensions" TEXT, "Retail availability" TEXT)

Which operating system has a storage (flash) of 128MB?
SELECT "Operating system version" FROM table_46730 WHERE "Storage ( flash )" = '128mb'
SELECT "Operating system version" FROM "table_46730" WHERE "Storage ( flash )" = '128mb'