I didnt see a endurance rating other then 5 year warranty. whats the tbw? or workload rating?

TBW is 2500 TBW for the 4TB model.

Since the red version is optimized for a nas, is there a problem if installed on a computer?

No, not a problem. This NAS SSD can be used in the place of a regular SSD. I use these NAS SSD as boot drives in automation computers that run 24/7. Work flawlessly.

Is it compatible with the synology ds-720+ nas as cache memory?

Yes, but speed is limited. This model is M.2 SATA, not NVMe. Cannot operate through onboard NVMe slots. Need SATA adaptor and install through conventional HDD slots with a maximum of 6 Gb/s speed. Likely only capable to work as read-only cache.

Is it slc, mlc, tlc, or qlc? they are advertising it as a "nas ssd," it should be at least be mlc for that form of performance?

THE WD red SSD series is TLC. Note that a number of reliability studies have shown that TLC and MLC have similar reliability factors, and the WD drive has a large amount of sparing, which provides a very high write endurance, >700 TB for the 500 GB model. The WD SA series is designed for NAS caching, which has very high write ratios, but also works well as a normal drive or RAID drive.

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Description

🚀 Elevate your NAS game with WD Red SA500 — where speed meets endurance!

COMPACT EFFICIENT - Slim 2.5-inch form factor with low power consumption, perfect for sleek NAS builds that never compromise on speed.
TURBOCHARGE YOUR NAS - Purpose-built WD Red SSD optimized for caching, delivering lightning-fast access to your most-used files.
NEXT GEN 3 D NAND TECH - Leverages proven Western Digital 3D NAND to maximize SATA III performance for both home and business NAS users.
UNMATCHED RELIABILITY - Engineered for 24/7 NAS environments with superior endurance to handle heavy read/write workloads without breaking a sweat.
SEAMLESS MULTI USER PERFORMANCE - Reduces latency and boosts responsiveness for OLTP databases, multi-user setups, and demanding 4K/8K video editing tasks.

The Western Digital 500GB WD Red SA500 NAS SSD is a 2.5-inch SATA III drive designed specifically for NAS systems. Featuring 3D NAND technology, it delivers up to 560 MB/s read speeds and is engineered for 24/7 operation with superior endurance. Ideal for caching, multi-user environments, and high-demand applications like 4K/8K video editing, it ensures reliable, high-performance storage tailored for both home and business NAS setups.

Specifications

Brand	Western Digital
Product Dimensions	10.03 x 6.99 x 0.71 cm; 4.25 g
Item model number	WDS500G1R0A
Manufacturer	Western Digital
Series	SA500
Color	Red
Form Factor	2.5-inch
Hard Drive Size	500 GB
Hard Disk Description	Solid State Hard Drive
Hard Drive Interface	Serial ATA-600
Hard Disk Rotational Speed	7200
Wattage	52 watts
Hardware Platform	PC
Are Batteries Included	No
Lithium Battery Energy Content	2 Kilowatt Hours
Lithium Battery Packaging	Batteries contained in equipment
Lithium Battery Weight	2 g
Number Of Lithium Ion Cells	5
Number of Lithium Metal Cells	5
Item Weight	4.24 g

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