PowerShell 7.3 - Difficulty with Recursive Directory Listing and File Size Calculation
I've looked through the documentation and I'm still confused about I'm having a hard time understanding I'm trying to create a script in PowerShell 7.3 that recursively lists all files in a directory and calculates the total size of files for each extension. However, I'm running into an scenario where the file size for certain extensions seems to be inaccurately calculated, and I need to figure out why. I've used the following code snippet: ```powershell function Get-FileSizeByExtension { param ( [string]$path ) $results = @{} Get-ChildItem -Path $path -Recurse | ForEach-Object { if ($_.PSIsContainer) { return } $ext = $_.Extension.ToLower() if (-not $results.ContainsKey($ext)) { $results[$ext] = 0 } $results[$ext] += $_.Length } return $results } $directoryPath = "C:\MyFiles" $fileSizeResults = Get-FileSizeByExtension -path $directoryPath $fileSizeResults | Format-Table -AutoSize ``` When I run this code, I expect to see a total size for each file extension, but I noticed that the sizes for `.mp4` files are sometimes significantly lower than expected. For example, one `.mp4` file is 500MB on disk, but the output shows only 250MB. I've inspected those files and they are not corrupted. I've also tried using `-File` with `Get-ChildItem` to ensure I'm only processing files, but it hasn't resolved the discrepancy. Additionally, I've checked permissions on the directories, and I have read access to all the files. Is there something I'm overlooking? Could this be related to how PowerShell handles file streams or any specific file system behavior? Any insights would be greatly appreciated. I'm using Powershell LTS in this project. Cheers for any assistance! I'm open to any suggestions.