2 possibe types of data storage are online (cloud) storage and flash memory.
For online storage, some advantages are:
- the saved disk space, because it reduces the amounts stored on hard disks;
- availability anywhere;
- easy sharing, because you can make some folders accessible by several people, etc.
Some disadvanges are:
- requires an Internet connection;
- is less safe from hackers than offline means of storage.
For flash memory, some advantages are:
- the portability, since it comes in very small shapes (like thumd drives or SD cards);
- the cost, being the cheapest option.
Some disadvanges are:
- the limited storage space;
- the possibility to contract and transfer viruses from and to computers.