The amount of storage, both internal and external, that a table has is becoming increasingly important, especially as internal cameras increase in resolution resulting in photographs and videos that take up more and more storage.
Internal memory is important for many apps and the operating system which means that this should be reserved for those items that cannot be stored elsewhere. Having a memory card slot which will take memory cards can decrease the strain on internal memory by allowing the storage of some files elsewhere.
The Samsung Galaxy Tab E Lite Kids does come with a memory card slot. This will take memory cards up to 32 gigabytes in size, increasing the available storage.