Basic question, but I can't find where ti access my files on galaxy s3. I know they exist somewhere because I have the option to attach files to email. But I can't find where I can delete unwanted files I have looked everywhere on my device.
It can be confusing when new. Best way on a Samsung is the built in app not confusingly called My Files. The yellow icon is probably still hiding on the Samsung folder / tray of icons on the app drawer/list.
You can select and delete from there.
There are other file managing apps on the Play Store like ES File Explorer.
Sure. I switched back to the TouchWiz launcher to show you, so it's a bit bare.
I may be wrong, but I had a Galaxy S2 before this Galaxy Note 3 which has more stock apps, and they both had a Samsung folder (I call it a tray!) as well as a Google folder and Galaxy (plus) folder.
If you still can't see it, you can check in Settings - General - Applications Manager - All - My Files that it's there.