My Passport Wireless, Pro, and SSD Compatibility List Answer ID 11737 This answer shows the list of compatible devices with the My Passport Wireless, PRO and SSD.*END. USB 3 into a USB 2 port. Externally powered. Internal Airport used. How do I find out whether its 2.4 or 5 ghz? Drive is actually a caddy containing two WD 1tb 3.5 drives. Disconnecting/unmounting either of the drives has no effect on connecting to wifi or no connection. When the power is cut to the caddy (both drives), then wifi isn't a problem, so it appears to be mains or the USB cable (which is A to B connectors. I will replace the USB cable and see if that;s the issue. At the moment I cannot physically move the sky router as there's only one telephone port – Apr 3 '16 at 9:10. ![]() If one of your external drives is connected using USB 3, then this is most likely the culprit. If the shielding has degraded on the USB 3 cable then it can interfere with your wi-fi. If you external has any other type of connectors, i.e., USB 2 or FW800, switching to that will solve your problem. This excerpt from this explains why this can happen. USB 3.0 has a 5Gbps signaling rate. The USB 3.0 specification requires USB 3.0 data to be scrambled and it requires spread-spectrum. The noise from USB 3.0 data spectrum can be high (in the 2.4-2.5GHz range). This noise can radiate from the USB 3.0 connector on a device (such as a PC or Router), the USB 3.0 connector on the peripheral device or the USB 3.0 [port]. If the antenna of a wireless device operating in this band is placed close to any of the USB 3.0 radiation channels, it can pick up the broadband noise. The broadband noise emitted from a USB 3.0 device can affect the SNR (signal-to-noise ratio) and limit the sensitivity of any wireless receiver whose antenna is physically located close to the USB 3.0 device. This may result in a drop in throughput on the wireless link. USB 3 into a USB 2 port. Externally powered. Internal Airport used. Drive is actually a caddy containing two WD 1tb 3.5 drives. Disconnecting/unmounting either of the drives has no effect on connecting to wifi or no connection. When the power is cut to the caddy (both drives), then wifi isn't a problem, so it appears to be mains or the USB cable (which is A to B connectors. I will replace the USB cable and see if that's the issue. At the moment I cannot physically move the sky router as there's only one telephone port – Apr 3 '16 at 9:12 •. I've had the same problem on my Macbook Pro Retina 2017 when connecting an external hard drive through a dongle. That Mac has two thunderbolt ports, one very close to the other. I've managed to solve the issue by unplugging my dongle from the port closest to display and plugging it into a port that's a bit farther from display. I've read that the reason for this problem may be that HDD is stealing power from WiFi when hardware is too close to each other, or something like that. Anyway, plugging it into another port solved the issue for me. UPDATE: It seems like the solution was a one-time. If that doesn't work, try plugging your laptop into power. Maybe even moving an extern disk as far away as possible from mac. Plugging into power solved it for me this time.
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