can i do hot swap with it or do i need to turn it off?

All TeraStations support hot-swapping.

Can i choose raid 1 on a 4 drive setup? Basically mirroring drive 1&2 with drive 3&4?

On a 4-drive setup, you can create two RAID 1 arrays or one RAID 10 array. RAID 1 does not work with 4 drives.

I would like to use this for 4k streaming of my uhd iso colection will it work good?

You can stream 4K videos from the TeraStation. If you run into any issues, please contact our support team: https://www.buffalotech.com/support

How do i transfer videos from my phones, ipads, and smaller usb drives to this?

consider this as another drive like "C" the only difference is that it is external. It will be another drive that shows "D" "E" etc.

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💼 Secure your digital empire with speed and style.

SEAMLESS CLOUD SYNC - Hybrid cloud integration with Dropbox, Azure, OneDrive & more for flexible scalability.
SPEED MEETS SIMPLICITY - Native 2.5GbE port delivers blazing fast transfers without costly upgrades.
PEACE OF MIND GUARANTEED - 3-year warranty with 24/7 US-based award-winning support and data recovery service.
EFFORTLESS DATA PROTECTION - Pre-configured RAID 1 ensures instant, reliable backup out-of-the-box.
FUTURE PROOF EXPANDABILITY - 4-bay design with 2 empty slots lets you scale storage as your data grows.

The BUFFALO TeraStation 3420DN is a professional-grade 4-bay desktop NAS featuring 8TB of pre-installed NAS-grade drives configured in RAID 1 for immediate data protection. It boasts a native 2.5GbE port for fast network transfers, 256-bit encryption for robust security, and hybrid cloud integration for flexible backup options. Designed for SMBs and professionals, it offers easy setup, future expandability, and a 3-year warranty with award-winning US-based support.

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Hard Drive	8 TB Mechanical Hard Disk
Brand	BUFFALO
Series	TeraStation 3420DN
Item model number	TS3420DN0802
Hardware Platform	Mac, PC
Item Weight	12.3 pounds
Product Dimensions	9.1 x 6.7 x 6.7 inches
Item Dimensions LxWxH	9.1 x 6.7 x 6.7 inches
Flash Memory Size	8 TB
Hard Drive Interface	Ethernet
Manufacturer	BUFFALO
ASIN	B08LQXJW4B
Date First Available	October 15, 2020

BUFFALOTeraStation 3420DN 4-Bay SMB 8TB (2x4TB) Desktop NAS with Hard Drives Included Network Attached Storage

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