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
Antihost offers managed WordPress hosting with free migration, one-click staging and a 14-day free trial.
A WordPress migration can fail even when the finished site would fit on the destination. The process may need room for the compressed backup, an extracted copy of every file, the database export and import, and temporary working files. The full condition may be in the hosting account quota, database storage, or a temporary directory such as /tmp.
Keep the old site online, preserve a complete backup of both files and database somewhere else, identify which storage limit is blocking the job, then either remove disposable temporary data, add capacity, or transfer the files and SQL separately. Do not change DNS or shut down the source until the restored site has passed testing.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →What “not enough space” means during a WordPress migration
The destination server is short of usable working space at some stage of the move. WordPress describes its disk_full condition as “There is not enough free disk space to complete the update.” A migration has similar requirements, but the constraint can occur outside the visible web-root folder.
A complete WordPress site consists of two different assets:
#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.
- The file tree: WordPress core,
wp-content/uploads, plugins, themes, custom files andwp-config.php. - The database: posts, pages, settings, users, comments, plugin data and other records exported as SQL.
A database export by itself is not a site backup. WordPress’s migration guidance says to back up the WordPress directory, images, plugins and other files as well as the database, then upload the files and import the database on the new server.
Migration software commonly creates an archive, writes it to the destination, extracts it, and imports the database. That means the destination can temporarily hold several representations of the same site. A server with just enough room for the final extracted files can still fail while the archive or SQL import is being staged.
Quick wins for a faster PC:
Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Where the missing space may be
Check each storage boundary instead of looking only at the size shown for the website folder.
| Storage area | What can fill it | What to inspect |
|---|---|---|
| Web-account filesystem or quota | The uploaded archive, extracted WordPress files, old copies and other account data | The hosting panel’s disk-usage and quota view, or filesystem usage over SSH |
| Database volume | The imported database, an existing database, temporary import files or a database quota | Database storage and the destination database’s available allocation |
| Temporary directory | Archive extraction, upload fragments, control-panel work files and abandoned temporary files | The migration tool’s configured temporary path and the server’s temporary directory, often /tmp |
WordPress’s common-errors guidance notes that operations can fail when /tmp contains too many files even if another filesystem has free capacity. A quota can also be exhausted by mail, logs or unrelated sites under the same hosting account.
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.
Measure before deleting anything
Use the host’s file manager or quota screen first. On a host that allows SSH, commands such as df -h (filesystem capacity), du -sh /path/to/wordpress (site-tree usage) and du -sh /tmp/* (temporary entries) can show different limits; your host may restrict access or use a different temporary path. Ask support for the account quota, database-volume usage and temporary-directory limit when those figures are not exposed.
Record the size of the source file tree, the database export and any migration archive. Those measurements let you plan a transfer instead of relying on a universal multiplier. No WordPress guidance establishes a rule that the destination must have exactly twice the backup size.
Safe recovery runbook
- Leave the old site available. Do not delete files, databases or hosting space on the source until the destination is verified. It is your rollback path if the retry is incomplete.
- Create an independent full backup. Store the file tree and a database export away from the constrained destination. Keep uploads, plugins, themes and
wp-config.phpwith the SQL file; the SQL export does not contain those files. An external drive or another server can hold the set if the destination account is full. - Confirm the backup can be used. Check that the archive opens or the files are readable and that the SQL export is complete enough to import. Do not treat an abandoned, partially uploaded archive on the new server as your only backup.
- Measure all three capacity points. Check account quota, database storage and the temporary directory used by the migration tool or control panel. Note which one reaches its limit during the failed attempt.
- Remove only disposable destination data. After the independent backup is safe, delete stale migration archives, caches and temporary extraction directories that are no longer needed. Remove only items you can identify; do not delete the active site tree to make a number fit.
- Increase capacity when the data itself is too large. Choose a larger storage allocation or hosting plan if the measured files, database, temporary working copy and operational headroom cannot fit together. The required amount is site-specific.
- Retry with a lower-space path. Instead of creating a second full archive on the destination, transfer the WordPress files and SQL export separately, or stage the archive on another machine or server and stream or copy from there.
- Configure the destination. Create or select an empty destination database, edit
wp-config.phpwith its database name, user, password and host, then import the SQL. Ensure the copied files have the permissions expected by the hosting environment. - Test before cutover. Check the restored site privately, fix any migration errors, and change DNS only after the destination is working.
What you can safely remove—and what you must keep
| Item on the new server | Action | Reason |
|---|---|---|
| Abandoned migration archives from failed attempts | Delete after an independent backup exists and the archive is no longer needed | They can duplicate the site and consume quota without contributing to the restored copy |
| Temporary extraction directories and upload fragments | Delete only when you can identify them as leftovers from the failed job | They are working data, not part of the final site |
| Caches | Clear through the relevant application or hosting control, then verify the site | Cache files are disposable, but removing the wrong directory can damage an application |
Only copy of wp-content/uploads |
Keep | It contains the media that the database references |
| Only database export | Keep | It is required to recreate the site’s content and settings |
| Live source site | Keep until cutover is complete | It is the rollback copy if the destination fails |
If you cannot distinguish a cache or temporary folder from a live directory, stop and ask the host or the migration-tool vendor. Freeing space is not worth deleting the only usable copy of site data.
Manual migration when a plugin runs out of space
A manual move is often the most transparent low-space workflow because you control when each component is present. It still requires a complete backup and enough room for the final files and database.
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.
1. Export the database separately
Use the source host’s database export tool or an approved command-line utility to produce an SQL file. Save it off the destination. If the export tool offers compression, a compressed transfer can reduce network traffic, but the destination still needs room for the uncompressed import process and database data.
2. Copy the WordPress files without a second full archive
Transfer the source file tree directly with the host’s file manager, SFTP or another method available to both servers. Prioritize wp-content/uploads, plugins, themes and configuration files, while preserving paths and file names. If a direct server-to-server copy is unavailable, stage the files on a separate machine or storage device rather than filling the destination with multiple failed archives.
Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstall3. Prepare an empty destination database
Create the destination database and database user using the host’s control panel or documented database tools. Import the SQL into that empty database. Importing into a clean target makes it easier to tell whether a failure is caused by capacity or by leftover tables from a previous attempt.
4. Point WordPress at the new database
Edit the copied wp-config.php with the destination credentials and database host. Confirm the file is in the WordPress root and that the web server can read it. A database connection error at this stage usually indicates credentials, host name or permissions rather than missing disk space.
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.
5. Correct domain values only when necessary
If the domain changes, update the home and siteurl values and perform a serialization-safe search-and-replace for the old URL. WordPress warns that a naïve replacement across the entire database can break serialized values used by settings and plugin data. Use a tool that understands serialized data, and keep the original SQL export so you can restore if the replacement is wrong.
Choosing the right remedy
Use the option that matches both the capacity problem and the access you have to the destination.
| Remedy | Best fit | Trade-off |
|---|---|---|
| Clean leftovers and retry the automated migration | The quota is blocked by abandoned archives, caches or temporary extraction files | Fastest path, but the same archive-and-extract space requirement remains |
| Upgrade destination storage | The measured file tree, database and working copies genuinely exceed the allocation | Costs more, but preserves the automated workflow and provides headroom |
| Manual file and SQL transfer | You can access files and database tools but cannot hold another full archive | More hands-on configuration and testing; fewer hidden temporary copies |
| Stage off-server, then restore | The destination is too constrained to receive and unpack the archive safely | Requires separate storage and an additional transfer step |
Evaluate each choice by available working space, the path data will take, recovery safety, access to quotas and temporary directories, and how much control you want over automation. A migration tool can be convenient, but its temporary-space behavior is not identical across hosts; confirm where it writes working files before retrying.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How much space should the new server have?
There is no authoritative WordPress-published capacity multiplier that applies to every site. Calculate from measurements:
Best Value
- [Upgraded Version] - This external hard drive features a mirrored logo stripe combined with a striped anti-slip design, and the rounded corners of the casing make it easier to grip. The stripes also have a heat dissipation function, ensuring stable and fast data transfer.
- 【Ultra-thin and quiet】 - The motherboard adopts JMicron 578 noise-free solution, giving you a quiet working environment. Lightweight and portable size designed to fit in your pocket for easy portability.
- 【Ultra-Fast Data Transfers】 - Pairing this external hard drive with JMicron 578 solution USB 3.0 and USB 2.0 interfaces enables blazing-fast data transfer. It boasts theoretical read speeds of up to 125MB/s and write speeds of up to 103MB/s.
- 【Plug and Play】 - With no software to install, just plug it in and the drive is ready to use.The hard disk chip is wrapped with an aluminum anti-interference layer to increase heat dissipation and protect data.
- 【What You Get】 - 1 x Portable Hard Drive, 1 x USB 3.0 Cable, 1 x User Manual, Gift-type shell packaging ,Three-year manufacturer's warranty and free technical support services.
- the complete WordPress file tree, including uploads, plugins and themes;
- the database’s imported size and the SQL export;
- the archive, if your method creates one;
- temporary extraction and import files;
- headroom for logs, caches and normal operation during the move.
The destination needs enough simultaneous working room for the stages your chosen method performs. A direct file copy plus SQL import may avoid retaining a second compressed archive, while an all-in-one package may require the archive and extracted tree at the same time. Measure the source and ask the host how quota and database limits are counted before selecting an allocation.
Troubleshooting after space is freed
The retry fails immediately
Recheck the account quota and temporary directory. If /tmp or the tool’s configured work path is full, deleting files in the web root will not help. Have the host clear orphaned temporary files if you cannot identify them safely.
The archive uploads but extraction stops
The destination may have room for the compressed upload but not for the extracted tree. Remove the archive and leftovers only after preserving the off-server backup, then use a direct file transfer, a staged restore or more storage.
The files are present but the site shows a database error
Check the database name, user, password, host and permissions in wp-config.php, and verify that the SQL was imported into the intended empty database. This symptom is distinct from a filesystem quota failure.
The site loads but media or settings are missing
Confirm that wp-content/uploads and plugin and theme directories were copied. A database-only restore cannot recreate those files. Review URL replacement carefully if the domain changed, because damaged serialized values can affect settings and widgets.
Test the destination before changing DNS
Use a hosts-file override, a staging URL or another private check so visitors continue using the old site while you verify the copy. Walk through this checklist:
- Front-end pages, navigation and search
- Administrator login and permissions
- Database connection and recently published content
- Media-library items and images in posts
- Active themes and plugins
- Permalinks and representative 404 handling
- Forms, email delivery and other integrations
- Scheduled jobs and maintenance tasks
- HTTPS certificate, redirects and mixed-content behavior
Only after these checks pass should you point DNS at the new server. Keep the old site and the independent backup until DNS has propagated and you have confirmed the destination remains stable.
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.
