diff --git a/6.File_Management/File Management with PowerShell.md b/6.File_Management/File Management with PowerShell.md
index ffd8677..3f14c65 100644
--- a/6.File_Management/File Management with PowerShell.md	
+++ b/6.File_Management/File Management with PowerShell.md	
@@ -65,3 +65,128 @@ $fileSize = Get-ChildItem -Path "C:\mrsh\test.ps1" -Recurse -Force | Measure-Obj
 
 $fileSize.Sum/1KB
 ```
+
+## Environement Variable
+
+Environment variables in PowerShell are used to store system-wide 
+or user-specific values that programs and scripts can access during execution. 
+They help manage configuration settings such as file paths, system behavior, 
+or application options without hard-coding them into scripts. 
+In PowerShell, environment variables are accessed through the `Env:` drive, 
+for example `$Env:PATH`, and can be created or modified using simple assignment. 
+This makes scripts more flexible, portable, and easier to maintain 
+across different systems.
+
+
+```powershell
+$env:ProgramFiles
+$env:ProgramData
+$env:SystemDrive
+$env:SystemRoot
+```
+
+## Match Replace
+
+```powershell
+$string = "Jello world!"
+
+if($string -match "Hello"){
+    Write-Output "The string matches the pattern!"
+    $newString = $string -replace "Hello" , "Hi"
+    Write-Output $newString
+}
+```
+
+## TextFile
+
+Text files are commonly used to store and exchange data in a simple, 
+readable format. 
+
+### Set-Content
+
+The `Set-Content` cmdlet is used to create a new text file 
+or overwrite an existing one with specified content. 
+
+```powershell
+Set-Content -Path "C:\mrsh\endor.txt" -Value "Ewoks"
+```
+
+### Get-Content
+
+The `Get-Content` cmdlet is used to read the contents of a text file, 
+returning its data line by line, which is useful for processing or analyzing text.
+
+```powershell
+Get-Content -Path "./endor.txt"
+```
+
+### Add-Content
+
+```powershell
+Add-Content -Path "C:\mrsh\endor.txt" -Value "Jedi"
+```
+
+## CSV
+
+In PowerShell, CSV (Comma-Separated Values) files are widely used for storing and 
+exchanging structured data such as tables and lists. 
+
+
+### Import-CSV
+
+PowerShell provides the `Import-Csv` cmdlet to read CSV files 
+and convert each row into an object with properties based on the column headers, 
+making the data easy to work with.
+
+```powershell
+Import-CSV -Path ".\Simpsons.csv"
+```
+### Export-CSV
+
+The `Export-Csv` cmdlet is used to save objects back into a CSV file. 
+This object-based approach allows for efficient data manipulation, 
+filtering, and reporting.
+
+```powershell
+Get-ComputerInfo | Export-CSV -Path "C:\mrsh.com\same-simpson.csv" 
+```
+
+## JSON
+
+In PowerShell, JSON (JavaScript Object Notation) is commonly used to 
+store and exchange structured data in a lightweight, 
+human-readable format. 
+This makes it easy to work with APIs, configuration files, 
+and complex data structures. JSON support in PowerShell enables seamless data interchange and efficient automation.
+
+### ConvertFrom-Json
+
+The `ConvertFrom-Json` cmdlet to transform JSON data into PowerShell objects. 
+
+```powershell
+$json = Get-Content -Path ".\simpsons.json" -Raw
+$data = ConvertFrom-Json -InputObject $json
+```
+
+### ConvertTo-Json
+
+and `ConvertTo-Json` to convert objects back into JSON format. 
+
+```powershell
+Get-NetAdapter | ConvertTo-Json | Out-File ".\NetworkAdapter.json"
+```
+## XML
+
+In PowerShell, XML is used to store and manage structured data in a hierarchical 
+format. 
+XML data is represented as objects, making it easy to navigate, 
+extract, and modify elements and attributes. 
+This makes XML useful for working with configuration files, 
+system data, and applications that rely on structured document formats.
+
+```powershell
+$xml_file = Get-Content C:\mrsh\simpsons.xml
+$xml_file.simpsons.charcter[0]
+$xml_file.save("C:\mrsh\simpsons-nex.xml")
+```
+