DVD Writer for my QNAP

Could you please help me by listing a few DVD and CD optical drives that are compatible with QNAP TS-251D?

There are big brands giving up manufacturing external CD/DVD drives. There are few USB2.0 and USB3.0 based models available:

ASUS 90-DT20305-UA151KZ

BDXL Format Support
Allows users to burn huge amounts of data on a single Blu-ray disc, up to 100GB on BD-R(TL), and 128GB on BD-R(QL)

The Best Burning Quality
Auto Tuning Power technology ensures optimised power to burn a disc with the best quality

6X Blu-ray High Speed
Turbo Engine enables 6X Blu-ray writing

Flexible Dual Positioning
Vertical and horizontal two-way placement

And USB 3.0 based

OWC Mercury Pro 16X Blu-ray, 16X DVD, 48X CD Read/Write Solution

Buffer Memory: 4MB

Performance:
Access Time
BD-ROM: 180ms typ.
DVD-ROM: 160ms typ.
DVD-RAM: 180ms typ.
CD-ROM: 150ms typ.

Supported Formats:
BD-ROM (SL/DL), BD-RE (SL/DL), BD-R (SL/DL), DVD-ROM (SL/DL), DVD-R (SL/DL), DVD-RW, DVD+R (SL/DL), DVD+RW, DVD-RAM, CD-ROM, CD-ROM, XA-Ready, CD-I, Photo-CD (Single & Multi-Session), Video-CD, CD-Audio Disc, Mixed Mode, CD-ROM (Data and Audio), CD-R, CD-RW

Data Capacity
128GB : Blu-ray Quad Layer
50GB : Blu-ray Double Layer
25GB : Blu-ray
8.5GB : DVD General Use Double Layer
4.6GB : DVD General Use
700MB : 79 minute CD
650MB : 74 minute CD
550MB : 63 minute CD

M-DISC Support
Yes, M-DISC DVD / Blu-ray engraving / burning requires M-DISC specific media (available separately)
Maximum Read Speeds
BD-ROM: 12X
BD-R: 12X
BD-RE: 8X
BD-ROM (Dual Layer): 8X
BD-R (Dual Layer): 8X
BD-RE (Dual Layer): 6X
BD-R (Triple Layer): 6X
BD-R (Quad Layer): 6X
DVD-RAM: 5X
DVD-R: 16X
DVD+R: 16X
DVD-R (Dual Layer): 12X
DVD+R (Dual Layer): 12X
DVD-RW: 12X
DVD+RW: 12X
DVD-ROM: 16X
DVD-ROM (Dual Layer): 12X
CD-ROM: 48X
CD-R: 48X
CD-RW: 40X
Maximum Write Speeds
BD-R: 16X
BD-RE: 2X
BD-R (Dual Layer): 12X
BD-R (Triple Layer): 12X
BD-R (Quad Layer): 6X
BD-RE (Dual Layer): 2X
BD-RE (Triple Layer): 2X
M-DISC/+M: 4X
DVD-RAM: 5X
DVD-R: 16X
DVD+R: 16X
DVD-R (Dual Layer): 8X
DVD+R (Dual Layer): 8X
DVD-RW: 6X
DVD+RW: 8X
CD-R: 48X
CD-RW: 24X

douper External Blu Ray DVD CD Drive, Portable USB 3.0 3D Blu Ray Player Aluminum Alloy BD CD DVD RW ROM Burner Writer Rewriter Reader with Storage Case

Read Speed (max.)

• DVD-ROM: 8X
• CD-ROM: 24X
• BD-ROM: 2.0X (for Video) / Max 6X (for Data) A + 4

Write Speed (max.)

• CD-R: 24X
• CD-RW: 16X
• DVD-R: 8X
• DVD-R DL: 6X
• DVD-RW: 6X
• DVD + R: 8X
• DVD + R DL: 6X
• DVD + RW: 8X
• DVD-RAM: 3X-5X PCAV (4.7GB)

Pioneer BDR-XD07B 6X Slim Portable USB 3.0 BD/DVD/CD Burner

• Clamshell design
• USB 3.0
• Slim and lightweight, Supports BDXL CyberLink Software Silver Retail

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