Media upload error

In random order:

• check [web dashboard of your webhost] if there is enough storagespace to upload more files
• check using FTP if the ../wp-content/uploads folder has the required propperties, allowing for access and reading and writing to both the folder and all subfolders >> FTP > right-click the uploads-folder > file propperties > The set the numerical value to 755 > tick box to apply to sub-folders and files > OK to save
• occasionally it’s an update or plugin that causes these problems [see below]

1. Use FTP to access your site
   bv. http://filezilla-project.org/download.php
2. rename all plugins by putting a ‘0’ in front of each plugin -folder;
   ../wp-content/plugins
3. Check if the access / ‘normal functioning’ has been restored
4. If so: one-by-one, remove the ‘0’, checking every time to see if the problem re-occurs.
5. when the problem re-occurs, you’ve found the source of the problem; Delete and find a similar plugin that works with your site
6. alternatively: FTP:Delete; Then download and install / activate a NEW version of the problematic plugin and see if this works.

Alternatively:
Instead of ftp, use the webaccess dashboard functions provided by the webhost.
This usually is not as versatile and more cumbersome.