My USB doesn't 'see' my 128g backup drive but does 'see' (F drive) the 64b thumbnail. What gives?

The F drive does not show on any explorer when the 128g thumbnail is in, but does when the 64g or a card reader is plugged in. or:The F drive does not

The F drive does not show on any explorer when the 128g thumbnail is in, but does when the 64g or a card reader is plugged in.

or:The F drive does not show on any explorer when the 128g thumbnail is in, but does when the 64g or a card reader is plugged in.

or:My first guess is the drive has no format. Go to tucows.com and search for \"partition\". I like \"Easeus\".A hard drive must have at least one partition defined, and it must have a format that your OS can use. A partition program will display all that information and make the neccessary changes.

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