Nowadays, we seldom use the laptop CD/DVD ROM drive.
If you happen to have an additional SATA hard drive from your spoil or old laptop, you can get a caddy SATA 2.5 HDD SSD CASE and slot it into the Laptop CD/DVD-ROM.
Installation is quite simple, remove the CD/DVD-ROM drive and insert your 2.5 SATA hard drive into the caddy case. Then put the whole caddy enclosure into the CD/DVD-ROM slot.
Windows will auto detect the additional 2.5 SATA hard drive.
With the 2nd hard drive, you can easily backup your files.
Remember to google for your laptop CD/DVD-ROM size before you purchase. There are 2 standard size.
9.5mm Universal 2nd Hard Disk Drive Caddy SATA 2.5 HDD SSD Case Enclosure
12.7mm Universal 2nd Hard Disk Drive Caddy SATA 2.5 HDD SSD Case Enclosure