My external hard drive does not show up when

I am assuming (because you did not tell me) that you are running a version of Windows. You need to open help and support and search under drive management. The drive is showing as raw because you have not yet created a basic volume or any partition structure.

I would advise that you run CCleaner regularly to get rid of unused system files. You could also use WinDirStat to show you which files are taking up the most space on your laptop.

CCleaner PC Optimization and Cleaning Free Download
https://windirstat.info/

Depending on the Operating System you are using (i.e. Windows or Mac OSX etc.), they deal with deleting files in different ways. In the case of an Apple Mac, it doesn't actually delete you files, but instead moves them to the recycle bin which is located ON your external hard drive. This means that in order to make the space available, you have to empty your recycle bin on your desktop whilst the hard drive is plugged in and it will empty the folder for you. Or look for a hidden folder on the root of your Hard Drive called Recycle and delete it (it will be recreated by your system when your system needs it).

Alternatively, 1TB is a large drive meaning that it is possible that your file structure has become "fragmented". Don't worry yourself with the specifics, but if you right-click on the drive and access the Properties, choose the Tools tab and use the Defragment tool. Also it might be worth using the Check Disk For Errors option, although Defragment is more relevant in this case.

If you run through these basic troubleshooting steps listed above I hope you will gain access to your cleared space.

Click start control panel administrative tools computer management then select event viewer this may vary depending on what operating system you have
extend the events there you will see errors in red you will no what exactly what the error was and at what time it occured
Right click on the error message select properties you will see all details about the error
or click start type in event viewer press ENTER
this should give you some sort of understanding of the error and
you might be able work your way through the problem You could run the chkdsk disk utility
Click start run type cmd then type chkdsk/r/f which will scan for and attempt to repair any bad sectors and automatically fix any corrupt files on your Hard Drive.
or an easier way to run the chkdsk utility
Windows 7 chkdsk
http://www.w7forums.com/use-chkdsk-check-disk-t448.html
Click start control panel administrative tools computer management ,disk management right click on your drive select properties click tools click check now click start two boxes
automatically fix files and scan for and attempt recovery of bad sectors place then a tick in both boxes then select check now, start should schedule this task when restart
have no input while the chkdsk utility is in progress any input may further damage your computers Operating System and Hard Drive
http://download.cnet.com/jetclean/3000-18512_4-75627788.html
JetClean tidies your registry, gets rid of junk files, deletes broken shortcuts, and attempts to give your computer that like-new feel again.
Optimizers and Diagnostics.
http://download.cnet.com/360Amigo-System-Speedup-Pro/3000-18512_4-75332741.html 5E3422139C19CBED35C14826A44D4605
also you might need to delete some stubborn files
http://www.malwarebytes.org/fileassassin.php

Click start control panel administrative tools computer management then select event viewer this may vary depending on what operating system you have extend the events there you will see errors in red you will no what exactly what the error was and at what time it occured Right click on the error message select properties you will see all details about the error or click start type in event viewer press ENTER you might be able work your way through the problem

There is companies that make data recovery, you could try them, there is also some for private use, but they are not that good. But those companies will pay a lot, if you have a good home insurance you could try them to pay recovery.

Depends how much you appreciate the information on hard disk.

im not up to speed with this type of error or what its associated with

if you want to know what this is the error code is related to

click start control panel administrative tools computer management then select event viewer this may vary depending on what operating system you have

extend the events there you will see errors in red you will no what exactly what the error was and at what time it occured

you might be able work your way through the problem

hope it helps

Click "Safely Remove Hardware" in your tooltray (one of those little icons on the lower right
of your screen across from the START button - its a green arrow over a PC board). That'll
remove it from the system, then re-attach it (Windows Plug-n-Play will find it and re-mount
the drive).
Then, deep-scan your anti-virus software on your entire system - the possible cause of loss
of directory structure on your external HDD.
Then, run CHKDSK on your Seagate External Hard drive - to make the directory structure sane again.
How-to-do-this: START> Run > (type in) chkdsk
Then, download (free) "Recuva" software from http://www.piriform.com to recover anything lost in
making your external HDD's directory/file structure sane again.
Run Recuva in this mode:
Recuva > Options (button) > Actions (tab) > Scan for non-deleted files (for recovery from damaged or
reformatted disks)

you could run the check disk utility
click start run type cmd then type chkdsk/r/f which will scan for and attempt to fix any bad sectors and automatically fix any corrupt files on your hard drive or
go to control panel administrive tools computer management you can right click on the drive select properties tools check now?tick in both boxes to scan for and repair/recover any bad sectors and automaticall fix any corrupt files
in xp
hope this helps

This Stop message, also known as Stop 0x24, indicates that a problem occurred within Ntfs.sys (the driver file that allows the system to read and write to NTFS drives).

Resolving the ProblemDisk Corruption. Corruption in the NTFS file system or bad blocks (sectors) on the hard disk can induce this error. Corrupted SCSI and EIDE drivers can also adversely affect the systems ability to read and write to disk, thus causing the error.
Check Event Viewer for error messages from SCSI and FASTFAT (System Log) or Autochk (Application Log) that might help pinpoint the device or driver that is causing the error. Try disabling any virus scanners, backup programs, or disk defragmenter tools that continually monitor the system. You also need to run hardware diagnostics supplied by the system manufacturer. For details on these procedures, see the owners manual for your computer. Run Chkdsk /f /r to detect and resolve any file system structural corruption. You must restart the system before the disk scan begins on a system partition. If you cannot start the system due to the error, use the Recovery Console and run Chkdsk /r.
rate me if you think its fixya...

regards,