Powershell Copy-Item Error when moving Bookmarks - windows

Question

One of my scripts is to move Google Chrome bookmarks from one machine on the network to another. When I run the script, it appears to run and then throws a Copy-Item error. Pretty sure there's something wrong with my file path, but I can't figure out what it is.
Code first, error follows:
[CmdletBinding()]
param(
[String]$SourceComputerName,
[String]$DestinationComputerName,
[String]$UserName
)
BEGIN {
$ErrorActionPreference = 'Continue'
$CMDOUT=#{ #This is used so that the function accepts -Verbose / -Debug parameters
Verbose=If ($PSBoundParameters.Verbose -eq $true) { $true } else { $false };
Debug=If ($PSBoundParameters.Debug -eq $true) { $true } else { $false }
}
$SourcePath = '\\' + $SourceComputerName + '\C$\users\' + $UserName + '\AppData\Local\Google\Chrome\User Data\Default' #Transfer Bookmarks from here
$DestinationPath = '\\' + $DestinationComputerName + '\C$\users\' + $UserName + '\AppData\Local\Google\Chrome\User Data\Default' #Transfer Bookmarks to here
}
PROCESS{
#Create copy of destination backup file, make sure not to overwrite other backup files that might exsist
If(Test-Path ($DestinationPath + '\Bookmarks')){
$i = 1
do{
$BackupPath = ($DestinationPath + '\Bookmarks') + '_' + $i.ToString('000') + '.old'
$i++
}
while(Test-Path $BackupPath)
Copy-Item -Path ($SourcePath + '\Bookmarks') -Destination $BackupPath #CMDOUT
}
#Copy Bookmarks to DestinationComputer
Copy-Item -Path ($SourcePath + '\Bookmarks') -Destination ($DestinationPath + '\Bookmarks') -Force #CMDOUT
#Replace the Chrome create Bookmark backup (.bak) file
Copy-Item -Path ($SourcePath + '\Bookmarks') -Destination ($DestinationPath + '\Bookmarks.bak') -Force #CMDOUT
#Copy Favicons (for bookmarks)
If(Test-Path ($DestinationPath + '\Favicons')){
Copy-Item -Path ($SourcePath + '\Favicons') -Destination ($DestinationPath + '\Favicons') -Force #CMDOUT
}
}
END{
}
}
Copy-Item : The network path was not found
At C:\Users\Shane.goldsberry\PowerShellScripts\PS1\MigrateChromeBookmarks.ps1:61 char:9
Copy-Item -Path ($SourcePath + '\Bookmarks') -Destination ($D ...
+ CategoryInfo : NotSpecified: (:) [Copy-Item], IOException
+ FullyQualifiedErrorId : System.IO.IOException,Microsoft.PowerShell.Commands.CopyItemCommand
Copy-Item : The network path was not found At C:\Users\Shane.goldsberry\PowerShellScripts\PS1\MigrateChromeBookmarks.ps1:63 char:9 Copy-Item -Path ($SourcePath + '\Bookmarks') -Destination ($D ...
+ CategoryInfo : NotSpecified: (:) [Copy-Item], IOException
+ FullyQualifiedErrorId : System.IO.IOException,Microsoft.PowerShell.Commands.CopyItemCommand