It means your hard disk (the hard drive) is almost filled to capacity. The easiest solution is to delete files you don't need.
If you use Windows the easiest ways to free up space are to empty the recycle bin (if you haven't), or go to My Computer/This PC and look at your hard drive (usually called the C: drive, might be different on yours) right-click on it, select Properties, select the General tab, and look for the Disk Cleanup option which will further delete temporary files, etc. Windows is especially bad for having excess files pile up over time.
If this doesn't give you enough free space then you'll have to delete or transfer some files stored on your computer, maybe purchase a flash drive if you have some files you'd want to store in a portable form. Or you can try to download a program like Bleachbit or SpaceSniffer (look up YouTube tutorials on them and be careful) to find and delete excess files.
If you're using a mac then it's mostly the same process of clearing out files you don't need. Check if your Apple iCloud isn't synced because I've seen a lot of people sync everything on their iCloud onto their Macbooks and it's just storing the files both on your laptop as well as the cloud, which is redundant.
I'm guessing it's a 2011-ish MacBook Air? Those generally come with 64-128 GB hard drives, which isn't very big. They're that small since they use safer, faster solid state drives (SSD) instead of a physical disc drive (HDD) which are usually cheaper and bigger storage capacity.
Those solid state drives have really come down in price recently so if there's a local computer shop you might be able to get them to upgrade it to 2-4 times the storage capacity for 100-200$.
As long as everything else is still working on it you should be able to still use it for a few more years, I think. If you have movies or photos or whatever you can also just purchase a 256 GB flash drive, use it to store all of your photos (or whatever), for like $50 and that should last you many more years as long as you don't lose it.
It means your hard disk (the hard drive) is almost filled to capacity. The easiest solution is to delete files you don't need.
If you use Windows the easiest ways to free up space are to empty the recycle bin (if you haven't), or go to My Computer/This PC and look at your hard drive (usually called the C: drive, might be different on yours) right-click on it, select Properties, select the General tab, and look for the Disk Cleanup option which will further delete temporary files, etc. Windows is especially bad for having excess files pile up over time.
If this doesn't give you enough free space then you'll have to delete or transfer some files stored on your computer, maybe purchase a flash drive if you have some files you'd want to store in a portable form. Or you can try to download a program like Bleachbit or SpaceSniffer (look up YouTube tutorials on them and be careful) to find and delete excess files.
If you're using a mac then it's mostly the same process of clearing out files you don't need. Check if your Apple iCloud isn't synced because I've seen a lot of people sync everything on their iCloud onto their Macbooks and it's just storing the files both on your laptop as well as the cloud, which is redundant.
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I'm guessing it's a 2011-ish MacBook Air? Those generally come with 64-128 GB hard drives, which isn't very big. They're that small since they use safer, faster solid state drives (SSD) instead of a physical disc drive (HDD) which are usually cheaper and bigger storage capacity.
Those solid state drives have really come down in price recently so if there's a local computer shop you might be able to get them to upgrade it to 2-4 times the storage capacity for 100-200$.
As long as everything else is still working on it you should be able to still use it for a few more years, I think. If you have movies or photos or whatever you can also just purchase a 256 GB flash drive, use it to store all of your photos (or whatever), for like $50 and that should last you many more years as long as you don't lose it.
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