Split & Concat for current macOS

Does anyone know of an app that can split & concat large files? A customer needs to send me a large file but the upload doesn’t work for the large file. I only find super old apps. Otherwise, I’ll have to do a Zoom session to do a Terminal command with him.

I have used Keka - the macOS file archiver
I guess it works for current macOS but haven’t tested.

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The app looks what I wanted. Thanks!