To get all of the files within a directory you can make use of the "files()" method available from the "Storage" facade. Running the code below will return an array of the files within the directory you have specified.
$files = Storage::files($directory);
If within the directory there are subdirectories then it will be listed as a directory, to get all of the files within the subdirectory you can call the "allFiles()" method.
$files = Storage::allFiles($directory);
Do note that it supports listing nested directories.
How to specify Disk instance used?
Since some Laravel applications will have multiple disks, you can specify the disk to use like below.
Storage::disk('s3')->allFiles('path/to/directory/); // if you are useing 's3' disk
Storage::disk('public')->allFiles('path/to/directory/); // if you are using 'public' disk
Do note that by default it will be using the one specified within the .env file like below.