Windows uses the colon not only for separating volume name from the rest of the path, but also to designate alternate data streams (an extension of extended attributes), which you thus accidentally created. They provide a tool for dealing with them

In reply to Re: Why are there no errors when opening a filename that contains colons on Win10 by soonix
in thread Why are there no errors when opening a filename that contains colons on Win10 by Lotus1

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