Epson WorkForce Pro WF-7820 All-in-One Inkjet Printer - Manual (Page 376)

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Environmental Specifications
Temperature Operating: 50 to 95 °F (10 to 35 °C)
Storage (after initial ink charge): 5 to 104 °F (-15 to 40 °C)
Storage (before initial ink charge): -4 to 104 °F (-20 to 40 °C)
1 month at 104 °F (40 °C)
Humidity
(without condensation)
Operating: 20 to 80% RH
Storage: 5 to 85% RH
Parent topic: Technical Specifications
Interface Specifications
Interface type Hi-Speed USB (Device Class for computers)*
Hi-Speed USB (for Mass storage class for external storage)
*: USB 3.0 cables are not supported.
Note: Epson cannot guarantee the operation of externally connected devices.
Parent topic: Technical Specifications
External USB Device Specifications
Do not use devices with the following requirements:
• Dedicated driver
• Security settings, such as password or encryption, etc.
• Built-in USB hub
Note: Use only external storage devices with independent AC power sources. External storage devices
that are powered via USB are not recommended. Epson cannot guarantee the operation of externally
connected devices.