If you like to use flash drives to transfer files between your different devices that use full-size USB and micro-USB, the 64GB Sandisk Ultra Flash Drive with Two Connectors (USB 3.0, microUSB, OTG), model SDDD2-064G-G46, is on sale for $16.72 with a limit of 30 per customer at Amazon by Amazon itself.
If you prefer the 32GB version, it goes for $9 with free shipping by Best Buy on eBay.
PS: for the microUSB OTG to work on your phone/tablet, your device must support it both in hardware and software.
PS2: as far as I know you cannot use this as a direct bridge, I think only one side can be active at any time, but I haven’t tested all options with all devices.
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