Yes it's possible to write a script to delete/move old files.
A simple example is here:
Batch delete files on FTP older than x days
For more fancy rules, it's better to use PowerShell:
How to delete files older than x days from SFTP server in PowerShell
You will find lot of other examples here on the forum and on Stack Overflow.

WinSCP version: 5.13.3
Microsoft windows: Windows 10 version 21H2
Transfer Protocol: SFTP
Use GUI Explorer Interface
Hello, I would like to know if it is possible to automatically move files to a different folder or delete files from a folder. For context, I receive files inside of a folder and have to manually move them after we use them. Is there a code or way to automate that process by saying for example "after x amount of days, move file from this folder into another folder" or "After x amount of days, delete the selected file"?
If there is a way, I have a follow up question. Is there possibly a way to only have the above process move select files and keep other ones in the original folder?
Please let me know, Thanks!