I have stored file paths which match particular text which I am looking for, in a variable. Now, what I want to do is copy those files, which match content I'm looking for, and put them into a new folder.

I have written the following simple scripts, neither of which work:

(I)

Copy-Item -path $match in $filepaths -Destination C:\newfolder -Recurse

Corresponding error messages, in the following order:

"a positional parameter cannot be found which accepts argument 'in'"
"ParametersBindingException"
"PositionalParameterNotFound"

(II) 

foreach($match in $filepaths)
{
 Copy-Item -path $match -Destination C:\newfolder
}

Corresponding error message, showing for each item in $filepaths:

"cannot find path" 

Any ideas as to how to make them work?

Version 1 won't work but version 2 should do. From the error you're getting I'd suggest the issue is related to $filepaths, so either how it's being generated or something about the paths that are being produced.

How is that variable being generated? Where it is pulling its content from?

It might be worth replacing the copy-item line with $match, eg

foreach($match in $filepaths)
{
 $match
}

so it displays what is being generated, and then check that it is outputting paths that are 1) valid and 2) exist.

I tried the above test, and this returns valid file paths.

However, I did apply the following to $files [the variable containing the original matching results]:

$filepaths = $files | Format-Table * -wrap

Could wrapping the results cause any issues, or formatting the results into a table?

$filepaths = Get-ChildItem c:\ -File
foreach($file in $filepaths){
    Copy-Item -path $file.Fullname -DestinationC:\newfolder
}