Showing and deleted hidden files?

I am trying to do a software update on my Blu-Ray DVD player. I downloaded the software from the manufacturer's website (Sharp), and placed the single file (which ends in .RVP) onto an empty USB memory stick.
I am unable to perform the update on the DVD player, because I get an error message that says there is more than one item on the memory stick. I am only seeing the one item, but Sharp tells me that the Mac places "invisible" files in there. They are not able to tell me how to delete the invisible files (nor how to display them)---can anyone point me in the right direction? Thanks!

Enable Finder to Show Invisible Files and Folders
Open the Terminal application in your Utilities folder. At the prompt enter or paste the following command line then press RETURN.
defaults write com.apple.finder AppleShowAllFiles TRUE
To turn off the display of invisible files and folders enter or paste the following command line and press RETURN.
defaults write com.apple.finder AppleShowAllFiles FALSE
Alternatively you can use one of the numerous third-party utilities such as TinkerTool or ShowHideInvisibleFiles - VersionTracker or MacUpdate.
This would be done on the Mac. However if you do this from a PC the files will become visible in Windows.

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