iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Keep the old backup recoverable until you have checked that the new service contains usable copies of the files you need. First establish what the old service actually holds, then make a second copy, transfer it by a route suited to your data and bandwidth, and verify the destination before cancelling or changing the old account.
What kind of cloud backup are you moving?
“Cloud backup” can mean a computer-backup product that captures files from a device, a cloud-drive or sync service, or object storage used for large datasets and applications. They do not necessarily store the same things or offer the same migration controls. The steps below apply broadly, but check the exact source and destination providers’ instructions for supported transfer methods, permissions, metadata, version history, encryption keys, charges and retention rules.
Do not assume that a folder visible on your computer contains every file in the cloud. Some sync services use online-only placeholders: the folder or file name appears locally, but the contents must be downloaded before another backup product can copy them. In an April 17, 2026 product statement, Backblaze described this as a limitation for some Windows Dropbox and OneDrive folders in its computer-backup product, while saying that product supports iCloud Drive and Google Drive. That is a product-specific description, not a universal rule for other backup services or operating systems. Backblaze’s explanation of cloud-sync behavior is one example of why to check your own setup.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
How do I move my files without losing them?
1. Make an inventory
List the computers, external drives, synced folders, shared folders and application data you need to preserve. Note which files are stored locally and which exist only in the old service. Identify special cases such as large files, unusual formats, shared permissions or files that are excluded from ordinary computer backup. This gives you a concrete checklist for the transfer and later verification.
#1 Best Overall
- Easily store and access 2TB to content on the go with the Seagate Portable Drive, a USB external hard drive
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop
- To get set up, connect the portable hard drive to a computer for automatic recognition no software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
2. Confirm the source is usable
Wait for the old service to report that its backup or sync is current. Then inspect its online file browser or restore view for the folders and important files on your inventory. Check a representative sample rather than relying only on the status indicator. If the source is the only copy of a file, make sure you can restore or download it before changing a plan, license or account setting that could remove it.
Backblaze’s migration guidance puts checking the existing backup before restoring or migrating. It also cautions that its Online Backup service is not designed for rapid device-to-device migration. Backblaze’s migration guidance is useful as a provider-specific example, not as a description of every backup product.
Rank #2
- Easily store and access 5TB of content on the go with the Seagate portable drive, a USB external hard Drive
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop
- To get set up, connect the portable hard drive to a computer for automatic recognition software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
3. Create a second copy before transferring
If the files are still available on a computer or external drive, copy them directly to the new service using its upload or sync client, or stage them temporarily on a local drive. A wired local copy can avoid downloading from one cloud service and uploading to another, but it requires enough local storage and compatible devices. If the old service is the only surviving copy, restore or download the files first; do not start by deleting or replacing that backup.
4. Choose a route that fits the data
For an ordinary personal collection with a local source, a straightforward route is to copy the files locally and let the new provider’s application upload or sync them. For a large dataset, a cloud-to-cloud integration or managed migration service may reduce manual handling, but verify that it supports both endpoints and the specific data you need.
Rank #3
- Easily store and access 1TB to content on the go with the Seagate Portable Drive, a USB external hard drive.Specific uses: Personal
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop. Reformatting may be required for Mac
- To get set up, connect the portable hard drive to a computer for automatic recognition no software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
Before using a specialist tool or service, check its access permissions, metadata and version handling, error reporting, encryption requirements, egress charges and verification options. Provider integrations are not universal consumer instructions: for example, Backblaze’s B2 documentation describes particular integrations and an S3-to-B2 Flexify route. It says files below 500 MB can be uploaded through its web interface and files above that require an integration; it also describes Flexify for transfers under 50 TB from Amazon S3 to B2, directing larger transfers to Sales. Those figures describe Backblaze B2’s documented options, not general cloud-migration limits. See the Backblaze B2 upload and migration options for that provider’s scope.
5. Keep the source while the new copy is checked
Do not treat a completed upload or a populated file listing as proof that every file arrived intact. Keep the old backup and any staging copy available while you compare the destination against your inventory. The point at which you can safely retire the old service depends on your provider’s retention and cancellation terms, so do not assume that cancelling merely stops future backups.
Rank #4
- Easily store and access 4TB of content on the go with the Seagate Portable Drive, a USB external hard drive.Specific uses: Personal
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop
- To get set up, connect the portable hard drive to a computer for automatic recognition no software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
Which transfer route should I use?
| Starting point | Practical route | What to weigh |
|---|---|---|
| Files remain on a computer or drive | Copy directly to the new service or to temporary local storage, then upload or sync. | Can avoid a cloud download-and-upload round trip; requires adequate local space and compatible devices. |
| Files exist only in the old cloud backup | Restore or download them before uploading to the new provider. | May take substantial time and bandwidth; first confirm the restore includes the files and versions you need. |
| Large dataset or many cloud files | Consider a supported cloud-to-cloud integration or managed migration service. | Confirm endpoint support, data scope, permissions, metadata behavior, charges and transfer reports before proceeding. |
| Cloud-sync folders are part of the source | Confirm that file contents are locally available or that the backup service can access the cloud files. | Online-only placeholders and backup exclusions vary by provider, operating system and product. |
How do I check that all my files transferred?
- Compare the destination’s folders and files with your inventory. Investigate missing folders, unexpected duplicates and upload exceptions.
- Review the new provider’s sync status, failed-upload queue or transfer report. Resolve errors rather than assuming they will retry successfully.
- Open representative files from the destination, including important documents, large files and specialized formats. If possible, test a restore to a different location so you know the files can be recovered independently of the sync view.
- For high-value data, keep both the source and staging copy until checks are complete. If both endpoints expose comparable checksums, compare them for stronger evidence that file contents match.
Checksum availability depends on the tools and services involved. Backblaze says its Universal Data Migration service provides MD5 byte-for-byte checking; that feature should not be assumed to apply to ordinary uploads or transfers through other providers. Backblaze’s migration service description explains the scope of that offering.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →When is it safe to cancel the old service?
Cancel only after the destination passes your checks and you have confirmed the old provider’s cancellation, retention, version-history and account-transfer terms. In particular, distinguish stopping future backups from deleting the existing backup: account controls can do more than their labels suggest.
Best Value
- Plug-and-play expandability
- SuperSpeed USB 3.2 Gen 1 (5Gbps)
Backblaze’s July 6, 2023 guidance illustrates the risk. For its computer-backup service, “Inherit Backup State” resumes a prior backup, while “Transfer License” starts a new one and deletes the old backup; Backblaze advises restoring needed data before proceeding. Other services have their own controls and rules, so consult the exact provider’s current documentation before taking an irreversible action. Read Backblaze’s explanation of these two account options.
What if the data is business-critical or very large?
Use a documented migration plan that records the data scope, who can access it, how errors will be handled, how the destination will be verified and how long the old copy will be retained. Review security and access permissions before granting a migration tool or provider broad access. If the dataset is too large or complex for a reliable manual process, a specialist may be appropriate; confirm the service’s supported sources, destinations and verification method before relying on it.
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.
Free tools Windows power users keep installed
One-click scans. No signup required.
