I downloaded a file from Mega.co.nz, and when it finished downloading I closed the open file command, and now I cannot find the downloaded file.
I use Firefox to access the download link.
So, what is the location of the downloaded file?
The site has nothing to do with this. The file has been downloaded to a (default) pre-set location, or wherever you have told Firefox to store it in a prompt.
First try opening your downloads: Firefox Button > Downloads (pops up). In here should be a list of all your downloads.
If this doesn't work:
You can find your pre-set download location here: Firefox Button > Options (pops up) > General Tab.
In this tab, there's a section "Downloads" where two options are displayed: (1) Save files in (2) Always ask where to store files.
In case (1), check this folder. In case (2), you have chosen a location yourself. You can use the Windows Explorer search function (if you really don't have a clue) for the file name, if you know it.
In recent versions of Firefox there is a download icon ⭳ on the right side of the Firefox toolbar. When you have completed a download, the download icon changes its color from black to blue.
Click on the download arrow and it will display a list of completed downloads.
Select any downloaded file in the list by moving the mouse cursor over it, and that downloaded file will change color to show you that you have selected it. Right-click the downloaded file that you have selected and from the popup context menu select Open Containing Folder and a file browser window (Windows Explorer in Windows) will open at the folder where your downloaded file is located. You can also open the file browser to the location where the downloaded file is located by clicking the open folder 🗁 which is marked by the mouse cursor in the above screenshot.
If you are using most recent versions of Firefox, now MEGA downloaded files are treated as a "blob resource" (to purposely avoid writing files using HTML5, something Chrome did when MEGA launched). Not sure if History might remember the "blob resource" address. However and from personal experience it either is a cached file or a link to an actual "process" that downloads the file as it should. Exiting Firefox does clear the "blob resource" link.
On older versions, probably a cached file, but that would also be deleted upon exit.
My recommendation: try re-downloading the file.
Mega.co.nz downloads the files in a temporary folder named idb, This folder is located here: C:\Documents and Settings\user\Application Data\Mozilla\Firefox\Profiles\frxzit8g.default\indexedDB\https+++mega.co.nz\idb
In this temporary folder the download creates a lot of small files. 1 MB size per file.
No idea, how to combine these all files.
Mega downloads the files in a temporary folder named idb, This folder is located here:
C:\Documents and Settings\user\Application Data\Mozilla\Firefox\Profiles\frxzit8g.default\indexedDB\https+++mega.co.nz\idb
In this temporary folder the download creates a lot of small files, after download is finished, it locates the entire download file at the FireFox download file.
If the Mega downloads is interrupting or stopping for any reason, the temporary file is stuck and takes a lot of free space.