RJ-2140 FAQs & Troubleshooting RJ-2140 Not your product? Sort by Updated Date Popularity 2 Results 1. 04/02/2019 How do I switch to and use the mass storage mode? 2. 11/10/2016 How do I insert/change the paper or label roll? More FAQs (English only) Machine FAQs & Troubleshooting