can i use an external hard drive for storage?

Yes you can use an external hard drive for storage. Just get one of those usb to sata cables/converter but look for high data transfer rate and you will be good to go. A programme called gparted is included in raspberry pi os that will easily partition and format. I use SSD drives for this due to there low power usage and faster data transfer. If you use a HDD drive you will have to power it separately. One thing I now do since raspberry pi os ( easy use operating system) has updated, it lets you run a SSD with the operating system on it and space for storage dependant on drive size as well. I do this for a few different operating systems instead of a SD card. Especially retro gaming as well as using the pi 400 as a desktop computer with raspberry pi os.

Why have I not received a refund despite returning the item more than three weeks ago? Why are you ignoring my correspondence?

This question needs to be asked to either Amazon or seller if marketplace. Not here as it just comes to people who have purchased not sold.

Is the audio port available as i dont have audio on my hdmi monitor cheers

Via USB yes there is no jack port built in

Can you run a full Bitcoin node on this computer...it doesn't seem to have a large hard drive to store a full copy of the blockchain on?

The cpu and system has no enough compute capacity. Hence, it will become useless. I mean. If you are thinking to use as a miner machine, it won't work for bitcoin. You can use for dogecoin, shiba, among others. However, you will get arou 1 or 2 dollars a month for each device.

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Raspberry Pi400 Desktop Computer Kit (UK layout)

Raspberry Pi400 Desktop Computer Kit (UK layout)

Product ID: 267313258

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Details

Brand
Raspberry Pi
Model name
RPI400-KIT-UK
RAM memory installed size
4 GB
Memory storage capacity
4 GB
CPU model
Cortex

⚡1.8GHz Speed

📶Dual-band WiFi

🔌3 USB Ports

Description

🚀 Elevate Your Tech Game with Raspberry Pi 400!

STUNNING VISUALS - Enjoy 4K video output through dual micro HDMI ports.
VERSATILE EXPANSION - Easily connect peripherals with multiple USB ports and GPIO header.
POWERFUL PERFORMANCE - Experience lightning-fast processing with a quad-core Cortex-A72.
SEAMLESS CONNECTIVITY - Stay connected with dual-band WiFi and Bluetooth 5.0.
UNLEASH YOUR CREATIVITY - Transform your ideas into reality with the Raspberry Pi 400!

The Raspberry Pi 400 Desktop Computer Kit is a compact and powerful computing solution featuring a quad-core Cortex-A72 processor, 4GB of RAM, and extensive connectivity options, including dual-band WiFi and multiple USB ports, all designed to inspire innovation and creativity.

Specifications

Brand	Raspberry Pi
Product Dimensions	0.03 x 0.03 x 2.3 cm; 1 g
Item model number	RPI400-KIT-UK
Manufacturer	Raspberry Pi
Series	RPI400-KIT-UK
Processor Brand	ARM
Processor Type	Cortex
Processor Speed	1.8 GHz
Processor Count	4
RAM Size	4 GB
Memory Technology	LPDDR4
Computer Memory Type	DDR4 SDRAM
Maximum Memory Supported	4 GB
Hard Drive Interface	USB 2.0/3.0
Graphics Chipset Brand	arm
Graphics Card Description	Integrated
Graphics RAM Type	DDR4 SDRAM
Graphics Card Ram Size	4 GB
Graphics Card Interface	Integrated
Connectivity Type	bluetooth
Wireless Type	802.11ac
Number of USB 2.0 Ports	1
Number of USB 3.0 Ports	2
Operating System	Raspberry Pi OS
Are Batteries Included	No
Item Weight	1 g
Guaranteed software updates until	unknown

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