Photoshop Automate>Batch to target just one file type

Thank for your help JJ, as always.

I found it and it's very nice, I looked around the Forums and found these two threads:

https://forums.adobe.com/thread/1246514

https://forums.adobe.com/thread/2203096

Based on it I wrote this script:

#target photoshop
// the script requires to select a folder, then it opens all the TIF or PSD inside it (including subfolders) and saves them as JPG quality 5.
var theFolder = Folder.selectDialog("select folder");
var fileandfolderAr = scanSubFolders(theFolder,/\.(tif|psd)$/i);                //var fileandfolderAr = scanSubFolders(topFolder,/\.(jpg|tif|psd|bmp|gif|png|)$/i);
var fileList = fileandfolderAr[0];
for(var a = 0 ;a < fileList.length; a++)
{
var docRef = open(fileList);
var Name = app.activeDocument.name
        
        var savePath = activeDocument.path;
        var saveName = File(savePath + "/" + Name)  
        SaveJPEG(saveName,5); 
        app.activeDocument.close(SaveOptions.DONOTSAVECHANGES); 
}
function scanSubFolders(tFolder, mask) { // folder object, RegExp or string
    var sFolders = new Array();
    var allFiles = new Array();
    sFolders[0] = tFolder;
    for (var j = 0; j < sFolders.length; j++){ // loop through folders            
        var procFiles = sFolders.getFiles();
        for (var i=0;i<procFiles.length;i++){ // loop through this folder contents
            if (procFiles instanceof File ){
                if(mask==undefined) allFiles.push(procFiles);// if no search mask collect all files
                if (procFiles.fullName.search(mask) != -1) allFiles.push(procFiles); // otherwise only those that match mask
        }else if (procFiles instanceof Folder){
            sFolders.push(procFiles);// store the subfolder
            scanSubFolders(procFiles, mask);// search the subfolder
         }
      }
   }
   return [allFiles,sFolders];
};
    function SaveJPEG(saveFile, jpegQuality){     
    jpgSaveOptions = new JPEGSaveOptions();     
    jpgSaveOptions.embedColorProfile = true;     
    jpgSaveOptions.formatOptions = FormatOptions.STANDARDBASELINE;     
    jpgSaveOptions.matte = MatteType.NONE;     
    jpgSaveOptions.quality = jpegQuality;      
    activeDocument.saveAs(saveFile, jpgSaveOptions, true,Extension.LOWERCASE);      
    };