output.txt

Round 0
   Testing Proton...
   Testing Google Drive...
   Testing OneDrive...
   Testing Mega...
Round 1
   Testing Proton...
   Testing Google Drive...
   Testing OneDrive...
   Testing Mega...
Round 2
   Testing Proton...
   Testing Google Drive...
   Testing OneDrive...
   Testing Mega...
Round 3
   Testing Proton...
   Testing Google Drive...
   Testing OneDrive...
   Testing Mega...
Round 4
   Testing Proton...
   Testing Google Drive...
   Testing OneDrive...
   Testing Mega...
Round 5
   Testing Proton...
   Testing Google Drive...
   Testing OneDrive...
   Testing Mega...
Round 6
   Testing Proton...
New-Object: test_cloud_strorage.ps1:40:14
Line |
  40 |  …        $f = new-object System.IO.FileStream $filename , Create, ReadW …
     |                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Exception calling ".ctor" with "3" argument(s): "The process cannot access the file 'C:\Users\______\Proton Drive\______\My files\testing\test.bin'   
     | because it is being used by another process."
   Testing Google Drive...
   Testing OneDrive...
   Testing Mega...
Round 7
   Testing Proton...
   Testing Google Drive...
   Testing OneDrive...
   Testing Mega...
Round 8
   Testing Proton...
   Testing Google Drive...
   Testing OneDrive...
   Testing Mega...
Round 9
   Testing Proton...
   Testing Google Drive...
   Testing OneDrive...
   Testing Mega...

test_cloud_strorage.ps1

$tests = @( 
    @{
        n = "Proton"
        f = "C:\Users\*\Proton Drive\*\My files\testing\test.bin" 
    }, 
    @{ 
        n = "Google Drive"
        f = "G:\*\testing\test.bin" 
    }, 
    @{ 
        n = "OneDrive"
        f = "C:\Users\*\OneDrive\testing\test.bin" 
    }, 
    @{ 
        n = "Mega"
        f = "C:\Users\*\Mega\testing\test.bin" 
    }
)

function createtestdata {
    $result = ""
    for ($i = 0; $i -lt 1024 * 10; $i++) {
        $result += (New-Guid).ToString()
    }
    $result = [System.Text.Encoding]::UTF8.GetBytes($result)
    return $result
}

for ($i = 0; $i -lt 10; $i++) {
    Write-Host "Round $i"
    $testdate = createtestdata

    foreach ($test in $tests) {
        Write-Host "   Testing $($test.n)..."

        $filename = (Get-ChildItem $test.f).FullName
        $f = new-object System.IO.FileStream $filename , Create, ReadWrite
        if(-not $?) {
            continue
        }
        $f.Write($testdate, 0, $testdate.Length)
        $f.Close()
    }
}