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SSD Data Recovery

JMicron JMS583 USB-to-NVMe Bridge Data RecoveryORICO external enclosures / Sabrent enclosures / JEYI enclosures

The JMicron JMS583 is the bridge chip inside most external NVMe SSD enclosures. When your external SSD stops working, the first step is removing the NVMe drive from the enclosure and connecting it directly to an internal M.2 slot. In most cases the SSD is fine and the bridge chip has failed. Our Austin lab uses board-level diagnostics and NAND-level techniques for JMicron JMS583 USB-to-NVMe Bridge recovery.

Louis Rossmann
Written by
Louis Rossmann
Founder & Chief Technician
Updated February 2026
5 min read

JMicron JMS583 USB-to-NVMe Bridge Technical Details

The JMicron JMS583 is the bridge chip inside most external NVMe SSD enclosures. When your external SSD stops working, the first step is removing the NVMe drive from the enclosure and connecting it directly to an internal M.2 slot. In most cases the SSD is fine and the bridge chip has failed.

JMicron JMS583 USB-to-NVMe Bridge Specifications

Manufacturer
JMicron
Interface
USB Bridge
DRAM Cache
No (HMB)
Channels
N/A

Not an SSD controller; this is the bridge chip in most external NVMe enclosures. N/A for chip-off.

Recovery Feasibility

No PC-3000 Support
Chip-Off Not Viable

Not an SSD controller; this is the bridge chip in most external NVMe enclosures. N/A for chip-off.

Drives Using the JMicron JMS583 USB-to-NVMe Bridge

The following consumer SSDs use the JMicron JMS583 USB-to-NVMe Bridge. If your drive is on this list, the failure modes and recovery approaches described on this page apply to your situation.

JMicron JMS583 USB-to-NVMe Bridge Drive Models

ORICO external enclosuresSabrent enclosuresJEYI enclosuresUGREEN enclosuresHundreds of other external NVMe enclosures

5 models affected

Failure Modes

Each failure mode has a different root cause and requires a different recovery approach. Identifying the correct failure mode is the first step in any recovery.

Bridge chip failure

Bridge chip failure causing non-detection. SSD itself is usually fine. Known data corruption with KIOXIA BG4 SSDs.

Symptoms you may notice

  • External NVMe SSD not detected
  • Enclosure LED on but no detection
  • Drive works when removed from enclosure

Related search terms

external NVMe SSD not detectedJMS583 failureNVMe enclosure not workingUSB-C SSD enclosure failure

Thermal disconnect and chipset issues

Thermal disconnect from heat buildup. AMD host chipset signal issues documented.

Symptoms you may notice

  • Drive disconnects during use
  • Drive works briefly then disappears
  • Issues on AMD systems

Related search terms

JMS583 thermal disconnectNVMe enclosure disconnectingexternal SSD keeps disconnecting

How We Recover JMicron JMS583 USB-to-NVMe Bridge SSDs

Firmware-Level Recovery

The PC-3000 does not yet have full Active Utility support for the JMicron JMS583 USB-to-NVMe Bridge. Recovery relies on manufacturer-specific diagnostic modes, service pin access, and NAND-level techniques.

We monitor PC-3000 firmware updates for new controller support. When utility support becomes available, firmware-level recovery will be the preferred path for this controller.

Chip-Off Recovery

Chip-off is not viable for the JMicron JMS583 USB-to-NVMe Bridge due to hardware encryption or architectural limitations. Recovery depends on accessing the controller through firmware-level tools or manufacturer diagnostic modes.

Not an SSD controller; this is the bridge chip in most external NVMe enclosures. N/A for chip-off.

Pricing

SSD firmware and logical recovery for the JMicron JMS583 USB-to-NVMe Bridge typically costs $300 to $500. Controller-level failures requiring advanced diagnostics are $500 to $1,500. Chip-off recovery, when viable, is $1,500 to $2,500.

See our full pricing breakdown for details. Our No Data, No Fee guarantee means you pay nothing if we cannot recover your files.

Hard Drive Data Recovery Standards & Verification

Our Austin lab operates on a transparency-first model. We use industry-standard recovery tools, including PC-3000 and DeepSpar, combined with strict environmental controls to make sure your hard drive is handled safely and properly. This approach allows us to serve clients nationwide with consistent technical standards.

Open-drive work is performed in a laminar-flow bench filtered to 0.02 µm, verified using TSI P-Trak instrumentation.

Transparent History

Serving clients nationwide via mail-in service since 2008.

Media Coverage

Our repair work has been covered by The Wall Street Journal and Business Insider, with CBC News reporting on our pricing transparency. Louis Rossmann has testified in Right to Repair hearings in multiple states and founded the Repair Preservation Group.

Aligned Incentives

Our "No Data, No Charge" policy means we assume the risk of the recovery attempt, not the client.

LR

Louis Rossmann

Louis Rossmann's well trained staff review our lab protocols to ensure technical accuracy and honest service. Since 2008, his focus has been on clear technical communication and accurate diagnostics rather than sales-driven explanations.

We believe in proving standards rather than just stating them. We use TSI P-Trak instrumentation to verify that clean-air benchmarks are met before any drive is opened.

See our clean bench validation data and particle test video

Frequently Asked Questions

How do I tell if my external NVMe enclosure failed or the SSD inside it failed?
Remove the NVMe SSD from the enclosure and connect it directly to an internal M.2 slot on a desktop motherboard. If the drive works, the JMS583 bridge chip in the enclosure was the problem and your data is fine. If the drive still does not work, the SSD itself has failed and needs professional recovery. Most external NVMe failures we see are bridge chip problems, not SSD problems.
Should I always remove the SSD from the enclosure before sending it for recovery?
Yes. If you can safely open the enclosure, remove the NVMe drive and try it in an internal M.2 slot first. This is a free diagnostic step that can save you both time and money. Many enclosure designs use simple tool-free slide mechanisms. If the drive works internally, you just need a new $15 enclosure instead of a $300+ recovery service.
What is the KIOXIA BG4 issue with JMS583 enclosures?
The JMS583 bridge chip has documented data corruption issues when used with KIOXIA BG4 NVMe SSDs. The bridge chip's command translation does not handle certain BG4 firmware behaviors correctly, which can lead to silent data corruption during writes. If you are using a KIOXIA BG4 in a JMS583-based enclosure and suspect data corruption, stop using the enclosure immediately and connect the drive internally.
My external NVMe SSD keeps disconnecting during file transfers. Is this the JMS583?
Thermal disconnect is a common JMS583 problem. The bridge chip generates heat during sustained transfers, and many enclosure designs have poor thermal dissipation. When the JMS583 overheats, it drops the USB connection. AMD host chipset signal issues have also been documented. If the disconnects are intermittent and happen during large transfers, thermal throttling is the likely cause. Try using the drive internally to confirm the SSD itself is healthy.
How much does JMS583 bridge failure diagnosis and recovery cost?
Diagnosis and recovery for JMS583-related issues costs $100-$500. If the bridge chip failed but the SSD is intact, we extract the drive and verify the data for $100-$200. If the SSD itself has also failed, recovery follows the pricing for whatever controller is inside the SSD, typically $300-$500 for common NVMe controllers. No charge if no data is recovered.

Not an SSD issue? We also recover hard drives, RAID arrays, and iPhones.

SSD Recovery Overview →

Nationwide Mail-In Data Recovery Service

We serve all 50 states with secure mail-in data recovery. Ship your failed drive to our Austin lab using our free shipping kit, and we'll diagnose it within 24-48 hours. No geographic limitations—we've successfully recovered data for customers from Alaska to Florida.

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JMicron JMS583 USB-to-NVMe Bridge SSD not working?

Ship it to our Austin lab for a free evaluation. No data, no charge.