Tablet computers generally do a good job of playing videos and music, and displaying photos and documents. But they have limited capacity to store all these files, so you typically can carry only a fraction of your PC’s data on them.

You can get apps that allow tablets to access files you’ve stored in the cloud on services like Dropbox or SugarSync, but these require an Internet connection and can be slow.

Q:

When Apple’s MobileMe service goes away in June 2012, what happens to the stuff I have stored on iDisk? Will Apple still store my material someplace else remotely on one of its servers that I can access via my laptop? Will I still have some sort of .Mac mail system that I can access when on the road and using a computer other than my own?

A:

Apple says it won’t continue to have the equivalent of the iDisk online storage system, accessible directly from the cloud, after MobileMe gives way to its new iCloud service. It advises iDisk users to copy their online files to their Macs or PCs before next June. However, it says the new service will still support mac.com and me.com email accounts, and they will still be accessible via the Web. It promises details later, but has in the meantime published a document answering common questions about the transition at apple.com/mobileme/transition.html.

Q:

Is there a good program that will allow me to capture a Web video, especially a YouTube video, and convert it into an MP4 format file so I can play it on my Android-based Iconia tablet while offline on an airplane?

A:

Once again, the way to buy music is changing.

For years, the legal digital music world has seemed relatively simple to grasp. There were two basic models: the online stores, where you buy singles or albums and store them on individual computers or devices; and the subscription services, where you pay a monthly fee or listen to ads for access to an online trove of songs.

Q:

I have a small but fast-growing business and am strongly considering going with Macs, but I’m not sure if it’s the cost-effective way to go. What are the pros and cons?

A:

To a great extent, it depends on the size and type of business, but I can give you a few general pros and cons. Macs typically cost more upfront, but can save in maintenance costs because they aren’t susceptible to most malicious software and, in my experience, they crash less often. They tend to be easier to network, and, like Windows PCs, they work with Microsoft Exchange. They run standard productivity software, like Microsoft Office, and can access most online business sites and services. But there are many niche business applications that are written for Windows only. You can overcome this by running Windows on a Mac for the occasional program. But if your business would best operate using software that is only for Windows, you’d likely be better off with a Windows machine.

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