Quick wins for a faster PC:
Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Error 0x8007045D in Windows 7 means ERROR_IO_DEVICE: Windows could not complete a requested read or write because something in the storage path returned an I/O error. The code does not identify one guaranteed failed part. The cause may be a bad DVD, optical-drive firmware, a USB cable or port, an external disk, an enclosure, a controller, or the source or destination drive.
The title is often mistyped as 0X08007045D. The canonical Windows code is 0x8007045D. Use the procedure below according to whether the failure occurs while burning a DVD, copying files to external storage, formatting, backing up, or installing.
As an Amazon Associate I earn from qualifying purchases.
What error 0x8007045D means
Windows assigns 0x8007045D to ERROR_IO_DEVICE, described as: “The request could not be performed because of an I/O device error.” An I/O operation is a read or write between Windows and storage. A read can fail while Windows is opening a file; a write can fail while it is copying, burning, formatting, or creating a backup.
The code is therefore a symptom, not a diagnosis. It does not prove that the external disk itself is dead. A defective disc, optical drive, USB connection, cable, enclosure, storage controller, source disk, or destination disk can interrupt the same request. Isolating those parts is more useful than repeatedly retrying the original operation.
#1 Best Overall
- USB-C 2-in-1 storage OTG: The Lexar JumpDrive Dual Drive D40E features USB Type-A and Type-C connectors in a slim, portable form factor for easy device compatibility
- Transfer speeds up to 100MB/s: Based on internal testing, performance may vary depending upon the host device, interface, and usage conditions. 1MB=1,000,000 bytes
- Plug and Play: Widely compatible with USB Type-C smartphones, tablets, laptops, Macs, and traditional Type-A devices, no software installation required. The 360° swivel design allows for easy switching between connectors without the hassle of losing a cap
- Durable & Compact: The Lexar D40E USB memory stick features a metal enclosure, withstands temperatures from 0° to 50° C (32°F to 122°F), and is lightweight at 26g with dimensions of 70.4 x 16.9 x 11.7mm
- Security & Warranty: Securely protects files using an advanced security software solution with 256-bit AES encryption. Backed by a Lexar 3-year limited warranty
Protect data before testing anything
Stop repeated writes
If the device still opens, immediately copy irreplaceable files to a known-good destination and open several of those copies to verify that they work. Do not keep retrying a failed copy, backup, format, or burn on a questionable device; repeated writes can increase stress on a failing disk.
Record the exact trigger
Write down what Windows was doing when the code appeared:
- Burning a DVD or using the Windows 7 “Like a USB flash drive” disc format.
- Copying files to or from an external hard disk.
- Running a backup, formatting a volume, or installing files.
- Reading one particular file or failing at different points in the operation.
Also note whether the problem follows one device when you change ports or computers. That observation determines the safest next test.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteChoose the least risky first test
| Situation | First reversible action | What a repeated failure suggests | Data risk |
|---|---|---|---|
| DVD burning | Use a new disc, preferably from another brand, and select a slower burn speed. | The disc, media batch, burner, or burner firmware may be at fault. | Low for the source files; the blank disc is disposable. |
| Copying to an external hard disk | Reseat the cable, try another USB port, then test a known-good cable or another computer. | If the error follows the disk, suspect the disk, enclosure, or its media. | Do not format or run repair commands until valuable files are protected. |
| Reading from a source disk | Try the same file or disk through another connection and copy readable data first. | The source media, cable, enclosure, or drive may be degrading. | High if the only copy is on the failing device. |
| Formatting or installation | Confirm the selected drive and test the storage path before destructive actions. | A persistent error can indicate a device or controller problem rather than a Windows setting. | Formatting erases data; recovery should come first. |
Fixes for DVD-burning failures
1. Replace the disc and change the brand
Remove the disc that failed and try a new, blank recordable DVD from a different brand or pack. A defective or incompatible disc can produce the same I/O code even when the burner is healthy. Do not use the failed disc as the only test of the drive.
2. Reduce the burn speed
In the burning program, choose a lower write speed than the maximum offered. A slower burn gives the drive more time to maintain a reliable write, and it is a recommended test when Windows 7 stops with 0x8007045D.
Rank #2
- High-speed USB 3.0 performance of up to 150MB/s(1) [(1) Write to drive up to 15x faster than standard USB 2.0 drives (4MB/s); varies by drive capacity. Up to 150MB/s read speed. USB 3.0 port required. Based on internal testing; performance may be lower depending on host device, usage conditions, and other factors; 1MB=1,000,000 bytes]
- Transfer a full-length movie in less than 30 seconds(2) [(2) Based on 1.2GB MPEG-4 video transfer with USB 3.0 host device. Results may vary based on host device, file attributes and other factors]
- Transfer to drive up to 15 times faster than standard USB 2.0 drives(1)
- Sleek, durable metal casing
- Easy-to-use password protection for your private files(3) [(3)Password protection uses 128-bit AES encryption and is supported by Windows 7, Windows 8, Windows 10, and Mac OS X v10.9 plus; Software download required for Mac, visit the SanDisk SecureAccess support page]
3. Check the burner manufacturer’s firmware guidance
Look up the exact optical-drive model and follow the manufacturer’s instructions for available firmware. Firmware updates are model-specific. Do not interrupt an update or apply firmware intended for another drive.
4. Check the Windows 7 UDF case
Microsoft documented this error during UDF operations involving DVD+/-RW media used in the “Like a USB flash drive” format. If your failure matches that scenario, check Microsoft’s Windows 7 UDF bulletin and install the update that applies to your Windows 7 edition and service level. An update for a different edition or service level is not an appropriate substitute.
Free tools Windows power users keep installed
One-click scans. No signup required.
5. Separate the disc from the drive
If multiple new discs and slower speeds still fail, test another compatible optical drive if one is available. If the same drive fails with different media, the drive or its firmware becomes more likely than one defective disc. Preserve the original files on the computer or another disk while testing.
Fixes for external-drive and file-copy failures
1. Reseat and replace the USB connection
Safely stop the transfer if possible, disconnect the external drive, and reconnect it firmly. Try a different USB port, then a known-good cable of the correct type. A loose connector, damaged cable, or unreliable port can interrupt a write and generate the I/O code.
2. Test the device on another computer
After protecting readable data, connect the drive to another Windows computer. If it works there, the original computer’s port or connection path is suspect. If the same error occurs on several ports and computers, the drive, enclosure, cable, or storage media is more likely to be failing.
Rank #3
- What You Get - 2 pack 64GB genuine USB 2.0 flash drives, 12-month warranty and lifetime friendly customer service
- Great for All Ages and Purposes – the thumb drives are suitable for storing digital data for school, business or daily usage. Apply to data storage of music, photos, movies and other files
- Easy to Use - Plug and play USB memory stick, no need to install any software. Support Windows 7 / 8 / 10 / Vista / XP / Unix / 2000 / ME / NT Linux and Mac OS, compatible with USB 2.0 and 1.1 ports
- Convenient Design - 360°metal swivel cap with matt surface and ring designed zip drive can protect USB connector, avoid to leave your fingerprint and easily attach to your key chain to avoid from losing and for easy carrying
- Brand Yourself - Brand the flash drive with your company's name and provide company's overview, policies, etc. to the newly joined employees or your customers
3. Do not format a disk that contains the only copy
Formatting may remove the file system and make recovery harder. A prompt to format an unreadable external disk is not evidence that formatting will repair the underlying I/O problem. Copy what you can first and stop if the device repeatedly disconnects or produces new read errors.
4. Run CHKDSK only after data protection
Microsoft Q&A troubleshooting for this error includes CHKDSK /R. The command checks the file system and attempts to locate readable information in bad areas, but it can take a long time and places additional work on a failing disk. Use it only when the correct drive letter is known and valuable files have already been copied.
Run CHKDSK /R safely in Windows 7
- Open Start, choose All Programs, open Accessories, right-click Command Prompt, and select Run as administrator.
- Identify the external volume’s drive letter in Windows Explorer. Replace
X:below with that exact letter; never guess it. - Enter
chkdsk X: /rand press Enter. - Read the result. Let the check finish if the disk remains stable, but do not repeatedly restart it after new mechanical, electrical, or disconnection symptoms.
- When it completes, retry a small, noncritical read or copy. If the original error returns, stop stressing the disk rather than looping the same check.
If Windows says the volume is in use, follow its prompt only when you are certain that the drive letter is correct and the volume is the one you intend to check. Never run the command against a different disk simply to make the prompt go away.
Use the failure pattern to identify the next step
The error occurs with one DVD
Replace the disc and lower the burn speed. This is the most reversible path and does not justify replacing the burner immediately.
The error occurs with several DVD brands
Check the burner’s firmware guidance and the Windows 7 UDF applicability. If failures continue with multiple discs, isolate the optical drive by testing another compatible drive.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsRank #4
- GOOD VALUE PACKAGE - 1 Pack 32GB Memory Stick USB 2.0 Flash Drives with great cost performance and high quality.
- BIG CAPACITY - The available capacity: 29.10GB-29.8GB, You can save the data of movies, music, photos, designs, programs, manuals, handouts in a high speed.Good performance in digital data storing, transferring and sharing with families, friends, workmates, clients and machines.
- EASY TO USE & PLUG AND WORK - Support windows 7 / 8 / 10 / Vista / XP / 2000 / ME / NT Linux and Mac OS, Compatible with USB2.0 and below.
- TWISTTURN DESIGN & EASY CARRY - The metal clip rotates 360° round the ABS plastic body which with rubber oil skin feeling finish. The capless design can avoid lossing of cap, and providing efficient protection to the USB port.
- WARRANTY & SUPPORT - SIMMAX logo is laser printed on the USB connector surface, our products are of good quality and we promise that any problem about the product within one year since you buy.
The error occurs only through one USB port
Use another port and replace the cable. The storage device may be healthy if it works reliably through a different connection.
The error follows an external disk
When the same disk fails across ports and computers, treat the disk, enclosure, cable, or media as suspect. Finish copying any readable files, then plan replacement rather than relying on the device for another backup.
The files are irreplaceable
Stop experimenting before formatting, initializing, replacing the enclosure, or repeatedly running repair commands. A professional data-recovery service is the safer escalation for a drive containing the only copy.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When replacement or professional recovery is appropriate
Persistent errors across different cables, USB ports, and computers are evidence that changing Windows settings alone is unlikely to solve the problem. If the device contains no needed data, replacement is generally safer than continuing failed writes. If it contains important data, prioritize specialist recovery and tell the provider exactly when the errors began and what tests have already been performed.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Keep a verified copy before retiring any repaired or intermittently working device. A successful single transfer does not establish that a disk is reliable for future backups; test the destination copy and maintain another independent copy of important files.
Best Value
- 【16GB Flash Drive】USB flash drives with 16GB capacity, meet your needs of daily use on work, school, home and travelling for photos, music, videos, files storage and transfer. IMEASON thumb drives can be used to store different files, easy to data backup.
- 【Metal Swivel Cap Design】USB thumb drive is metal swivel cover provides extra protection for the usb thumbdrive connector, no usb drive cap to lose; keychain design makes it easier to carry without worrying lose it.
- 【Wide Compatibility】USB drive supports Windows 7/8/10/11 / Vista / XP / Unix / 2000 / ME / NT Linux and Mac OS, also Supports USB 2.0 and 1.1 ports. USB Stick support TV, desktop, notebook computer, car, audio and other device. The USB Memory Stick is your great data storage and transfer companion with traveling and working.
- 【Easy to use】usb memory stick is plug and play without any software installation. Just simply plug the Flashdrive into the port of your USB-compatible devices such as computer, laptop to start data storage or transmission.
- 【What You Get】16 GB USB Flash Drive Thumb Drive, The default format of the usb storage flash drive is FAT32.
As an optional shortcut, Outbyte PC Repair can address more than 100 common Windows issues, including some broken system elements and shared DLL problems, and includes settings adjustments, temporary-file cleanup, privacy checks, vulnerability checks, a real-time boost, file shredder, and crash log. It runs on Windows 11, 10, 8, and 7; a category-based free trial lasts at least two days before a subscription. It complements antivirus software rather than replacing it, results vary, and no tool repairs every crash.
Frequently asked questions
Is 0x8007045D a virus warning?
No. The code identifies an unsuccessful storage read or write. It does not, by itself, establish malware or identify a specific failed component.
Why does the code appear during both DVD burning and external-drive copying?
Both operations depend on a complete I/O path. A disc or optical-drive problem can interrupt a burn, while a USB connection, enclosure, or hard-disk problem can interrupt an external copy; Windows can map either failed request to the same error.
Should I keep retrying until the copy succeeds?
No. If the data matters, protect it first and verify a separate copy. Repeated writes or repair attempts can add stress to a deteriorating device and may reduce later recovery options.
Frequently Asked Questions
Is 0x8007045D a virus warning?
No. It identifies an unsuccessful storage read or write and does not, by itself, establish malware.
Why can the same code occur during DVD burning and external-drive copying?
Both operations use an I/O path, so failures in media, drives, cables, enclosures, or controllers can produce the same Windows code.
Should I keep retrying a failed copy?
No. Protect and verify the data first; repeated writes or repairs can stress a deteriorating device.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
