I have a question about my laptop because it only has 90GB of storage space and it has become too small for me.
Are there any devices (etc.) that can extend the memory of my laptop?
If not installed onboard you can replace the hard disk. Or use external hard drives.
USB connectable external hard drives are the easiest option.
Extending is usually only possible by replacing the disk that is currently in there.
This means that either all the data on it has to be copied (cloned) to the new disk, or you reinstall everything yourself.
That comes now something on the laptop.
If here z.b. One m2. SSD is installed or similar jokes you can easily upgrade to normal SSD or HDD. Otherwise, an exchange of the installed plate i.d.r. Possibly - but that means that you also had to set up the laptop again.
The only other Alterantive would ne external hard drive. This can be anything from SSD to SSHD up to HDD of 100GB - several terabytes. Remember, this is the simplest solution but also the worst performance.
