To resolve the All-in-One WP Migration import limit—often capped at 512MB—and accommodate files as large as
, you can use manual file editing, a server-to-server transfer, or a dedicated "unlocker" plugin. 1. Manual "constants.php" Code Fix
This method involves manually editing the plugin's code to override its internal hard-coded limits. Install an Older Version
: Modern versions often block this edit. Download and install version 6.77 of the plugin. Access the Editor Plugin File Editor Select the Plugin All-in-One WP Migration from the dropdown menu. constants.php : Open the file named constants.php and search (Ctrl+F) for the string AI1WM_MAX_FILE_SIZE Change the Value : Locate the line that looks like define( 'AI1WM_MAX_FILE_SIZE', 2 << 28 ); and replace it with a much higher value. define( 'AI1WM_MAX_FILE_SIZE', 100 * 1024 * 1024 * 1024 ); Save Changes Update File . Your import limit should now reflect the new value. 2. The "Server-to-Server" Bypass
If you cannot increase the upload limit because of host restrictions, you can bypass the browser upload process entirely.
The All-in-One WP Migration plugin is a popular tool for moving WordPress sites, but the free version often enforces a small upload limit (usually 512MB). To handle a 100GB fix, you generally need to bypass these limits using specific configurations or older versions of the plugin. ⚡ The "100GB" Increase Fix
To bypass the upload limit without buying the Unlimited Extension, you can manually edit the plugin's code to increase the file size constant. 🛠️ Step-by-Step Manual Edit Open Plugin Editor: Go to Plugins > Plugin File Editor.
Select Plugin: Choose All-in-One WP Migration from the dropdown. Find the File: Open constants.php. allinone wp migration 100gb fix
Search for Max File Size: Press Ctrl + F and search for AI1WM_MAX_FILE_SIZE.
Edit the Value: Change the default value to a much higher number.
To set a 100GB limit, use: 2 << 36 or simply 100 * 1024 * 1024 * 1024. Save Changes: Click Update File. 📂 Better Alternatives for Large Sites (100GB+)
Modifying code can be unstable for massive backups. If you are dealing with a true 100GB site, consider these more reliable methods: 1. The "Import from FTP" Method
Instead of uploading through the browser (which often times out), move the file manually:
Use an FTP client (like FileZilla) to upload your .wpress file to /wp-content/ai1wm-backups/.
Go to the plugin in your WordPress dashboard and click Backups. Your 100GB file will appear there. Click Restore. 2. Increase Server Limits To resolve the All-in-One WP Migration import limit—often
Your server's PHP settings often override the plugin. Update your .htaccess or php.ini file: upload_max_filesize = 100G post_max_size = 100G memory_limit = 512M max_execution_time = 0 (Unlimited) ⚠️ Important Considerations
Timeouts: Browsers are not designed to upload 100GB. If the progress bar freezes, use the FTP method mentioned above.
Disk Space: Ensure your destination server has at least 250GB of free space (100GB for the file, 100GB for the extraction, and extra for overhead).
Plugin Versions: Some newer versions of the plugin have patched the constants.php edit. You may need to find a legacy version (v6.77 is often cited as the most flexible).
🚀 Need help with a specific error code?If you tell me the exact error message or your hosting provider, I can give you the specific PHP commands for their environment.
If you are dealing with 100GB+, do not rely on the standard browser upload button. The probability of the browser timing out or the connection dropping is near 100%.
Here is the professional workflow:
.wpress file to wp-content/ai1wm-backups/ using FTP/SFTP.This method is the only "fix" that reliably handles triple-digit gigabyte migrations without crashing your site or corrupting your data.
Did this guide help you move your website? Let us know in the comments if you encountered any specific error codes!
The official documentation tries to hide this, but if you have SSH or FTP access to your server, you can bypass the 100GB upload limit entirely by avoiding the upload form.
Step-by-Step Method (Works up to your disk space limit, not 100GB):
.wpress file locally. Note: If the backup fails at 40%, check your source server's disk space./wp-content/ai1wm-backups/
755..wpress file directly into this folder. (Use FTP for best results; if the file is 100GB, this will still take time, but it is more stable than HTTP).Why this works: The plugin doesn't "upload" the file; it simply reads it from the local disk. This bypasses PHP's upload_max_filesize and the 100GB HTTP restriction entirely.
Result: You have just fixed the 100GB limit without changing a single line of code.
Before we wield the scalpel, you must understand the enemy. The All-in-One WP Migration plugin (including its unlimited extension) relies on PHP and your web server to process file uploads. Summary: What is the Best Approach