I have to open a custom file within the app I am building but I am not sure how to do this. The file imported just contains folders within it which contains a plist

for example fileName.customExtension/name uuid/name.plist

if I open the custom file copy and paste the other folder "name uuid" into a regular folder which then I import in the app it works fine.

for example fileName/name uuid/name.plist

So how could i import the folder with the custom extension directly in the app?

I wrote the code below if the custom file is dropped in to the app to test at the moment but it doesn't work as I am guessing I am not converting the extension into a regular folder but instead just removing it.

func loadImportedFiles(){

    var fileName: String = ""
    let documentsDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
    do {
        let fileUrls = try FileManager.default.contentsOfDirectory(at: documentsDirectoryURL, includingPropertiesForKeys: nil)
        for plist in fileUrls {
            let path: String = plist.path
            let file = URL(fileURLWithPath: path).lastPathComponent

            if file.contains(".CustomExtension"){
                fileName = URL(fileURLWithPath: path).deletingPathExtension().lastPathComponent
            }
        }
    } catch {
        print("error path")
    }

    var objCBool: ObjCBool = true
    let mainPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0];
    let folderPath = mainPath + "/Folder/\(fileName)"

    let isExist = FileManager.default.fileExists(atPath: folderPath, isDirectory: &objCBool)
    if !isExist {
        do {
            try FileManager.default.createDirectory(atPath: folderPath, withIntermediateDirectories: true, attributes: nil)
        } catch {
            print(error)
        }
    }


    let originalDataFilePath = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first?.appendingPathComponent("\(fileName).CustomExtension")
    let newDestinationPath = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first?.appendingPathComponent("Folder/\(fileName)")

    do { try FileManager.default.moveItem(at: originalDataFilePath!, to: newDestinationPath!)
        print("imported")
    } catch {
        print(error)
    }


}

If someone could guide me in the right direction that would be great thanks!