Making Folders' Last Modified Date Correspond to Last Modified Date of It's Child Folders/Files

Question

In 2018, after moving my files to another drive, the modified date of my folders is updated. Is there way to change folder's modified date based on the latest modified file in the folder?

The folder path is D:\Yeni klasör\complete
There are 800 subfolders even maybe more! All of them is in the "D:\Yeni klasör\complete" parent folder.

These subfolders contain mostly music files. Example of one folder called "2003-Harem" :

https://i.hizliresim.com/P7voqb.png

Look the modified date of the latest file of that "2003-Harem" :

https://i.hizliresim.com/2OvkkO.png

I want these subfolders to be be exact same date/time what they got in inside. Example 2003-Harem folder should be 20.04.2016

Is there way to do it with one Powershell code? I am so bad at CMD/Powershell so the parent folder path is at the top.

I am even more bad at describing about what i want. Please don't hesitate to ask if you did not understand anything. :D Thanks in advance!

Answer 1

You can try something like this:

$Current_File  = Get-ChildItem "C:\My\Path\Here" -file -Recurse | Sort-Object -Property LastWriteTime -Descending | Select-Object -First 1
$Parent_Folder = Split-Path $Current_File.FullName
$Folder_Item   = Get-Item -Path $Parent_Folder

#Change "LastWriteTime" property to most current file
$Folder_Item.LastWriteTime = $Current_File.LastWriteTime

basically looks for the file with the most current time, and updates the parent folder to that time.

EDIT:

I haven't tested it out, but the logic is the same as what I commented so it should work. Test it on a few folders and not all of them first.

#Gather only the directories in your parent folder into a variable as an array
$Directory_Collection = Get-ChildItem -Path "C:\My\Parent_Folder" -Directory

#Create a foreach loop to iterate through all the folders 
    foreach($DIrectory in $Directory_Collection){
        

        #Use the current directory its on to loop through,
        #and get the most current file to update the directory date to
        $Current_File  = Get-ChildItem $DIrectory.FullName  -file -Recurse | Sort-Object -Property LastWriteTime -Descending | Select-Object -First 1
        $Parent_Folder = Split-Path $Current_File.FullName
        $Folder_Item   = Get-Item -Path $Parent_Folder

        #Change "LastWriteTime" property to most current file
        $Folder_Item.LastWriteTime = $Current_File.LastWriteTime
        }