Can this external hard drive be used with gaming consoles such as PlayStation or Xbox?

Yes, this external hard drive is compatible with gaming consoles such as PlayStation (PS4) and Xbox.

Is the UnionSine 4TB external hard drive pre-formatted for both Windows and Mac computers, or will I need to reformat it?

The UnionSine 4TB external hard drive is pre-formatted in EXFAT, which is compatible with both Windows and Mac OS X.

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UnionSine 4TB 3.5" External Hard Drive USB3.2Gen2 Type-C HDD Storage Compatible for PC, Desktop, Laptop,TV(Black) HD3510 Black 4TB

[Widely used] The vertical external hard disk does not occupy space, and the high-speed transmission speed is easy to use for PC office, 4K video image storage, TV recording, game storage, etc.
[High end hardware] The main control solution adopts Realtek RTL 9200B, which supports the speed of 10 Gbps. Using USB-C3.2 Gen2 high-speed interface, the actual read/write speed can reach 160mb/s~280 mb/s (the larger the capacity, the faster the speed)
[System Compatibility] Compatible with TV/Ps4/Xbox/Windows/Mac/Linux/DVD/Android, 4K TV recording, multi-brand TV
[Shockproof silicone] The silicone material is used internally, which can protect the hard disk and extend its service life in addition to shockproof and noise reduction.
[Safet]To optimize the current transfer efficiency, the cable has been upgraded to 22 AWG thick copper core. Internal use of anti-vibration silicon, fast heat dissipation, reduce noise