![]() ![]() Storing them only on the external drive means it's no longer a backup, just storage. The purpose of a backup drive is to have an extra copy of important files. ![]() However, if you're asking about whether to store all of your files on an external drive, the downside is that you won't have two copies of those files (unless you use another drive to backup the external drive with your files on them), so if the external drive with your files fails, you will lose them all. If you need significant space for files that you don't need to have backed up (for example, if you are doing video editing and need multiple copies or edits of a video, and the source video is already backed up), then you should use a separate external HDD for those files that you can afford to lose. I'm asking this because I want to know if I should use a separate external HDD for storing my actual files. As stuffe pointed out as well, Time Machine allows you to restore to a previous backup, since Time Machine may keep 7 or 8 backups on that 1 TB hard drive. There is more than one backup stored on that hard drive. The 1 TB hard drive will be filled up because Time Machine keeps your backups and deletes them once your hard drive is filled. Then it'll only take a snapshot that's about 120GB in size, and while that same snapshot will grow over time as I take more recent snapshots of my system, it will never go beyond 500GB because that's the maximum size of my internal HDD. Get one of the messages in Troubleshooting item #C4 (which oneĭepends on exactly what happened, and which version of OSX you're on.) My Answer #Time machine for mac space updateIf your backup disk is on the small side, and Time Machine needs to doĪ very large backup, either because you've added or changed a lot orĭone something like an OSX update since the previous backup, you may ![]() Thus, the more space it has, the longer it can keep your backups. Starts deleting the oldest backups so it can keep making new ones. But it won't just quit backing-up when it runs out: it Its backups, since it will, by design, eventually use all the spaceĪvailable. This is a trade-off between space and how long Time Machine can keep Up large amounts of backup space, for various reasons. Tendency to add more and more data to our systems over time, so if inĭoubt, get a bigger one than you think you need now.Īlso, there are some OSX features and 3rd-party applications that take Unfortunately, it's rather hard to predict, and most of us have a A drive that's too small may only have roomįor a few weeks (or even days) of backups. To work, but that's subject to problems any time a large backup isĪnd, of course, the larger the drive, the more old backups Time If you're a light user, you might be able to get 1.5 times If youįrequently add/update lots of large files, then even 5 times may notīe enough. Sure to add the size of the data on any other drives/partitions youīut this varies greatly, depending on how you use your Mac. Time Machine needs 2 to 4 times as much space as the data it'sīacking-up (not necessarily the entire size of your internal HD). How big a drive do I need for Time Machine?Ī general "rule of thumb" is, to keep a reasonable "depth" of backups, The smaller the backup drive the faster it will fill up and need to be erased or replaced.You probably want to check out this website for the most information, but here is the answer to your question, quoted from the website above: 1. Time Machine backup drives should be at least 2-3 times the total capacity of the drive(s) backed up. You can either erase the backup drive and start over or get a larger drive. #Time machine for mac space freeOnce Time Machine finds it cannot free up enough space for a new backup it reports the disk is full. ![]() Thus, from the user's viewpoint of the Time Capsule, it appears that no space has been freed, although there may be space in the sparse bundle. The Time Capsule sparse bundle grows in size as needed, but doesn't shrink. There are third-party utilities that will modify the backup interval such as Time Machine Editor. By default, Time Machine backs up hourly. If it was there for at least a week, it will be kept as long as there's room. If it was there for at least 24 hours, it will be kept for at least a month. How long a backup file remains depends on how long it was on your Mac before you deleted it, assuming you do at least one backup per day. The weeklies are kept as long as there's room. Time Machine "thins" it's backups hourly backups over 24 hours old, except the first of the day those "daily" backups over 30 days old, except the first of the week. Time Machine deletes older files if they have been deleted from the source when it needs space on the backup drive for a new incremental backup. ![]()
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