Powershell Compare Files from multiple subfolders

Question

I am trying to create a powershell to compare FILE SIZE from multiple subfolders

Today's files Folder Structure:

• TodaysFolder as a ROOT FOLDER
• TodaysFolder/Business/FolderA/ csv files
• TodaysFolder/Business/FolderB/ csv files

I want to compare today's csv file Size from multiple files / subfolders based on yesterday's data

• Reference Folder Structure:
• ArchiveFolder/YesterdayDate/Business/FolderA/ CSV files
• ArchiveFolder/YesterdayDate/Business FolderA/ CSV files

Also I plan to implement a condition if file size is <= 5 %, PASS If file size is > = 10 % size, FAIL

I will post the current code in a few, but just trying to get some ideas and guidance for this project.

$TodayPath =  "\\TodaysFolder\Business/FolderA\"
$TodayFiles = get-childitem $TodayPath  -Exclude Archive -Verbose | 
? {! $_.PSIsContainer} |
Select-Object  Name, @{Name='File Size'; Expression={([string]([int]($_.Length / 1KB))) + " KB"}} 


$archiveFolder = (get-date).AddDays(-1).ToString('yyyyMMdd')
$archiveFolderPath  = "\ArchiveFolder\YesterdayDate\Business\FolderA"

$ArchiveFiles =  get-childitem $archiveFolderPath  -Exclude Archive -Verbose | 
? {! $_.PSIsContainer} |
Select-Object  Name, @{Name='File Size'; Expression={([string]([int]($_.Length / 1KB))) + " KB"}} 


write-host $todayPath -ForegroundColor green
$TodayFiles

write-host "---------------------------" -ForegroundColor Red

write-host $archiveFolderPath -ForegroundColor yellow
$ArchiveFiles



Thanks