[Q] Accessing /data on non rooted EVO

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I have an otherwise stock EVO that I need to remove a file from /data.

Can I do this using adb?

It looks like I need root access to do this?

mount gives "operation not permitted" error. Is this a major undertaking or can I just install a simple package to get me access to this folder?

Maybe it will help if I give more details.

I have my phone connected to my laptop via USB, and am using adb shell to gain shell access to the phone.

If I cd to /data, it looks empty. I know it's not empty, because one of my apps stores data there.

I have read elsewhere that there may be a version of su that I can download and install via adb push. Could I use this to gain root access via adb shell and then use that to remount the /data file system so that I could modify files there?

It just occured to me that maybe I could use adb push to overwrite the files. I'll look into that too, but I'm sure I would get permission problems with that too.