PCIe 4.0 x4 NVMe
Both the supplied M.2 SSD and U.2 bay interfaces are specified as PCIe 4.0 x4 NVMe.
A QNAP adapter for installing one M.2 PCIe 4.0 x4 NVMe SSD in a 2.5-inch U.2 (SFF-8639) PCIe 4.0 x4 NVMe drive bay.

The QDA-UMP4 adapts one M.2 PCIe 4.0 x4 NVMe SSD to the supplied 2.5-inch U.2 SFF-8639 PCIe 4.0 x4 NVMe bay format.
Compare NAS types, storage planning and buying considerations in the DeviceDeal NAS Buying Guide.
Confirm that the exact PC, workstation or QNAP NAS provides the required 2.5-inch U.2 SFF-8639 PCIe 4.0 x4 NVMe bay. No individual host-model compatibility list was supplied.
Quick answers based on the supplied information for QDA-UMP4.
It adapts one M.2 PCIe 4.0 x4 NVMe SSD for use in a 2.5-inch U.2 PCIe 4.0 x4 NVMe drive bay.
The supplied product information identifies the U.2 drive-bay connector as SFF-8639.
The supplied description specifies one M.2 PCIe 4.0 x4 NVMe SSD.
No. The source states that no extra software or driver is required.
The supplied platforms are supported Windows or Linux PCs and workstations, plus supported QNAP NAS systems.
The product is covered by the applicable QNAP manufacturer warranty, but no warranty duration is stated in the supplied product information.
(QDA-UMP4)
QNAP QDA-UMP4 M.2 NVMe SSD to U.2 PCIe Gen4 Adapter
Both the supplied M.2 SSD and U.2 bay interfaces are specified as PCIe 4.0 x4 NVMe.
Designed for the stated 2.5-inch U.2 drive-bay format.
Uses the supplied U.2 SFF-8639 drive-bay connector.
The source says no extra software or driver is required.
Technical information below is organised from the supplied product data.
| Specification | Details |
|---|---|
| Product Details | |
| Brand | QNAP |
| SKU | QDA-UMP4 |
| Product Type | M.2 NVMe SSD to U.2 NVMe adapter |
| Storage Interfaces | |
| Supported SSD | 1 × M.2 PCIe 4.0 x4 NVMe SSD |
| Drive-Bay Format | 2.5-inch U.2 NVMe |
| Drive-Bay Connector | SFF-8639 |
| Drive-Bay Interface | PCIe 4.0 x4 NVMe |
| Platform and Software | |
| Supplied Platforms | Supported Windows or Linux PC/workstation; supported QNAP NAS |
| Software Requirement | No extra software or driver stated |
No individual PC, workstation or QNAP NAS compatibility list was supplied.
The host must provide the stated 2.5-inch U.2 SFF-8639 PCIe 4.0 x4 NVMe drive-bay interface.
| SKU | QDA-UMP4 |
| Model # | QDA-UMP4 |
| Barcode # | 885022022724 |
| Brand | QNAP |
| Shipping Weight | 0.3000kg |
| Shipping Width | 0.080m |
| Shipping Height | 0.080m |
| Shipping Length | 0.080m |
The QNAP QDA-UMP4 is supplied with the applicable QNAP manufacturer warranty.
No warranty duration was included in the supplied product information. Warranty coverage, eligibility and claim assessment are subject to QNAP terms. Please retain your DeviceDeal tax invoice as proof of purchase.
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