First question:
You need to convert the storage capacity from GB to MB because the image size is given in MB. 3 GB is equal to 3000 MB.
Then, you divide the storage capacity (3000 MB) by the size of each image (1 MB):
3000 MB / 1 MB = 3000 images
So a storage device with a capacity of 3 GB can store 3000 images with a file size of 1 MB each.
Second question:
The most appropriate type of storage device to use in a computer for storing videos would be a solid-state drive (SSD). SSDs are better than HDDs when it comes to storing large numbers of videos, they have faster data transfer rates, higher storage capacities, they're more durable, and they consume less power.