.Thumbnails may store excess, temporary data on your computer that can take up valuable space. It may also store private data such as passwords or browsing history in the registry or on the file system. The easiest way to erase this data is by downloading AppCleaner, it is 100% free and about 1MB in size. A portable version is also available.
If you want to clean .Thumbnails manually, you can follow the steps outlined below. There is one location in the file system where .Thumbnails stores data that can be cleaned.
To clean your file system from files stored by .Thumbnails and to gain free disk space, examine the following file system location. First of all, open a command prompt window:
Now list all the files stored by .Thumbnails that can be cleaned:
Once you have identified the files stored by .Thumbnails that you want to clean, delete them using the del command or Windows Explorer.