Thank you very much for your response, link2803. The problem I’m having is that neither my phone nor my tablet are attached as USB Mass Storage (but rather by MTP) and thus are not assigned a drive letter, which Win 32 Disk Imager seems to need.
If I was more skilled at all this, I’m sure I could find some kind of workaround. I’m a Windows user who has built several systems in the past, so I’m rather used to being able to find workarounds for things. This is just rather unfamiliar territory and I’m having that new tech panic.
Is there perhaps a different program which allows me to manually select a storage device for installing a Raspbian image? Am I just using the wrong one?